## Engage NY Eureka Math 3rd Grade Module 7 Lesson 17 Answer Key

### Eureka Math Grade 3 Module 7 Lesson 17 Problem Set Answer Key

Question 1.

The shapes below are made up of rectangles. Label the unknown side lengths. Then, write and solve an equation to find the perimeter of each shape.

a.

P =

Answer:

Perimeter of the given figure = 16 cm.

Explanation:

Length of the side AB in the given figure = 4 cm

Length of the side BC in the given figure = 2 cm

Length of the side CD in the given figure = 2 cm

Length of the side ED in the given figure = 1 cm

Length of the side EF in the given figure = 2 cm

Length of the side FA in the given figure = 3 cm

Length of the side GD in the given figure = 2 cm

Perimeter of the given figure = Length of the side AB + Length of the side BC + Length of the side CD + Length of the side ED + Length of the side EF + Length of the side FA + Length of the side GD

= 4 cm + 2 cm + 2 cm + 1 cm + 2 cm + 3 cm + 2cm

= 6 cm + 2 cm + 1 cm + 2 cm + 3 cm + 2cm

= 8 cm + 1 cm + 2 cm + 3 cm + 2cm

= 9 cm + 2 cm + 3 cm + 2cm

= 11 cm + 3 cm + 2cm

= 14 cm + 2 cm

= 16 cm.

b.

P =

Answer:

Perimeter of the given figure = 16ft.

Explanation:

Length of the side AB in the given figure = 2ft

Length of the side BC in the given figure = 1ft

Length of the side CD in the given figure = 1ft

Length of the side DE in the given figure = 1ft

Length of the side EF in the given figure = 2ft

Length of the side GF in the given figure = 2ft

Length of the side GH in the given figure = 5ft

Length of the side HA in the given figure = 2ft

Perimeter of the given figure = Length of the side AB + Length of the side BC + Length of the side CD + Length of the side DE + Length of the side EF + Length of the side GF + Length of the side GH + Length of the side HA

= 2ft + 1ft + 1ft + 1ft + 2ft + 2ft+ 5ft + 2ft

= 3ft + 1ft + 1ft + 2ft + 2ft+ 5ft + 2ft

= 4ft + 1ft + 2ft + 2ft+ 5ft + 2ft

= 5ft + 2ft + 2ft+ 5ft + 2ft

= 7ft + 2ft + 5ft + 2ft

= 9ft + 5ft + 2ft

= 14ft + 2ft

= 16ft.

c.

P =

Answer:

Perimeter of the given figure = 24m.

Explanation:

Length of the side AB in the given figure = 2m

Length of the side BC in the given figure = 2m

Length of the side CD in the given figure = 4m

Length of the side DE in the given figure = 2m

Length of the side EF in the given figure = 4m

Length of the side GF in the given figure = 2m

Length of the side GH in the given figure = 2m

Length of the side HA in the given figure = 6m

Perimeter of the given figure = Length of the side AB + Length of the side BC + Length of the side CD + Length of the side DE + Length of the side EF + Length of the side GF + Length of the side GH + Length of the side HA

= 2m + 2m + 4m + 2m + 4m + 2m + 2m + 6m

= 4m + 4m + 2m + 4m + 2m + 2m + 6m

= 8m + 2m + 4m + 2m + 2m + 6m

= 10m + 4m + 2m + 2m + 6m

= 14m + 2m + 2m + 6m

= 16m + 2m + 6m

= 18m + 6m

= 24m.

d.

P =

Answer:

Perimeter of the given figure = 26yd.

Explanation:

Length of the side AB in the given figure = 7yd

Length of the side BC in the given figure = 2yd

Length of the side CD in the given figure = 2yd

Length of the side DE in the given figure = 4yd

Length of the side EF in the given figure = 2yd

Length of the side FG in the given figure = 2yd

Length of the side GH in the given figure = 1yd

Length of the side HI in the given figure = 2yd

Length of the side IJ in the given figure = 2yd

Length of the side JA in the given figure = 2yd

Perimeter of the given figure = Length of the side AB + Length of the side BC + Length of the side CD + Length of the side DE + Length of the side EF + Length of the side FG + Length of the side GH + Length of the side HI + Length of the side IJ + Length of the side JA

= 7yd + 2yd + 2yd + 4yd + 2yd + 2yd + 1yd + 2yd + 2yd + 2yd

= 9yd + 2yd + 4yd + 2yd + 2yd + 1yd + 2yd + 2yd + 2yd

= 11yd + 4yd + 2yd + 2yd + 1yd + 2yd + 2yd + 2yd

= 15yd + 2yd + 2yd + 1yd + 2yd + 2yd + 2yd

= 17yd + 2yd + 1yd + 2yd + 2yd + 2yd

= 19yd + 1yd + 2yd + 2yd + 2yd

= 20yd + 2yd + 2yd + 2yd

= 22yd + 2yd + 2yd

= 24yd + 2yd

= 26yd.

Question 2.

Nathan draws and labels the square and rectangle below. Find the perimeter of the new shape.

Answer:

Perimeter of the ACDF new shape = 48cm.

Explanation:

Length of the side of AB in the given figure = 6cm

Length of the side of BC in the given figure = 12cm

Length of the side of CD in the given figure = 6cm

Length of the side of DE in the given figure = 12cm

Length of the side of EF in the given figure = 6cm

Length of the side of FA in the given figure = 6cm

Perimeter of the ACDF new shape = Length of the side of AB + Length of the side of BC + Length of the side of CD + Length of the side of DE + Length of the side of EF + Length of the side of FA

= 6cm + 12cm + 6cm + 12cm + 6cm + 6cm

= 18cm + 6cm + 12cm + 6cm + 6cm

= 24cm + 12cm + 6cm + 6cm

= 36cm + 6cm + 6cm

= 42cm + 6cm

= 48cm.

Question 3.

Label the unknown side lengths. Then, find the perimeter of the shaded rectangle.

Answer:

Perimeter of the DFGC shaded rectangle = 26in.

Explanation:

Shaded rectangle = DFGC

Length of the side of AB of the given figure = 16in

Length of the side of BG of the given figure = 2in

Length of the side of GC of the given figure = EA – BG = 7in – 2in = 5in.

Length of the side of CD of the given figure= AB – DE = 16in – 8in = 8in.

Length of the side of DE of the given figure= 8in

Length of the side of EA of the given figure= 7in

Length of the side of DF of the given figure= 5in

Length of the side of FG of the given figure= 8in

Perimeter of the DFGC shaded rectangle = Length of the side of FG + Length of the side of GC + Length of the side of CD + Length of the side of DF

= 8in + 5in + 8in + 5in

= 13in + 8in + 5in

= 21in + 5in

= 26in.

### Eureka Math 3rd Grade Module 7 Lesson 17 Exit Ticket Answer Key

Label the unknown side lengths. Then, find the perimeter of the shaded rectangle.

Answer:

Perimeter of the FGDE shaded rectangle = 30m.

Explanation:

Shaded rectangle = FGDE

Length of the side AB in the given figure = 12m

Length of the side BC in the given figure = 14m

Length of the side CD in the given figure = 5m

Length of the side DE in the given figure = AB – CD = 12m – 5m = 7m.

Length of the side EF in the given figure = BC – FA = 14m – 6m = 8m.

Length of the side FA in the given figure = 6m

Length of the side FG in the given figure = 7m

Length of the side GD in the given figure = 8m

Perimeter of the FGDE shaded rectangle = Length of the side FG + Length of the side GD + Length of the side DE + Length of the side EF

= 7m + 8m + 7m + 8m

= 15m + 7m + 8m

= 22m + 8m

= 30m.

### Eureka Math Grade 3 Module 7 Lesson 17 Homework Answer Key

Question 1.

The shapes below are made up of rectangles. Label the unknown side lengths. Then, write and solve an equation to find the perimeter of each shape.

a.

P =

Answer:

Perimeter of the given figure = 32m.

Explanation:

Length of the side of AB in the given figure = 4m

Length of the side of BC in the given figure = 9m

Length of the side of CD in the given figure = 7m

Length of the side of DE in the given figure = 2m

Length of the side of EF in the given figure = 3m

Length of the side of FA in the given figure = 7m

Perimeter of the given figure = Length of the side of AB + Length of the side of BC + Length of the side of CD + Length of the side of DE + Length of the side of EF + Length of the side of FA

= 4m + 9m + 7m + 2m + 3m + 7m

= 13m + 7m + 2m + 3m + 7m

= 20m + 2m + 3m + 7m

= 22m + 3m + 7m

= 25m + 7m

= 32m.

b.

P =

Answer:

Perimeter of the given figure = 34 cm.

Explanation:

Length of the side of AB in the given figure = 2 cm

Length of the side of BC in the given figure = 4 cm

Length of the side of CD in the given figure = 4 cm

Length of the side of DE in the given figure = 3 cm

Length of the side of EF in the given figure = 2 cm

Length of the side of FG in the given figure = 5 cm

Length of the side of GH in the given figure = 8 cm

Length of the side of HA in the given figure = 6 cm

Perimeter of the given figure = Length of the side of AB + Length of the side of BC + Length of the side of CD + Length of the side of DE + Length of the side of EF + Length of the side of FG + Length of the side of GH + Length of the side of HA

= 2 cm + 4 cm + 4 cm + 3 cm + 2 cm + 5 cm + 8 cm + 6 cm

= 6 cm + 4 cm + 3 cm + 2 cm + 5 cm + 8 cm + 6 cm

= 10 cm + 3 cm + 2 cm + 5 cm + 8 cm + 6 cm

= 13 cm + 2 cm + 5 cm + 8 cm + 6 cm

= 15 cm + 5 cm + 8 cm + 6 cm

= 20 cm + 8 cm + 6 cm

= 28 cm + 6 cm

= 34 cm.

c.

P =

Answer:

Perimeter of the given figure = 40in.

Explanation:

Length of the side of AB in the given figure = 12in

Length of the side of BC in the given figure = 2in

Length of the side of CD in the given figure = 4in

Length of the side of DE in the given figure = 6in

Length of the side of EF in the given figure = 4in

Length of the side of FG in the given figure = 6in

Length of the side of GH in the given figure = 4in

Length of the side of HA in the given figure = 2in

Perimeter of the given figure = Length of the side of AB + Length of the side of BC + Length of the side of CD + Length of the side of DE + Length of the side of EF + Length of the side of FG + Length of the side of GH + Length of the side of HA

= 12in + 2in + 4in + 6in + 4in + 6in + 4in + 2in

= 14in + 4in + 6in + 4in + 6in + 4in + 2in

= 18in + 6in + 4in + 6in + 4in + 2in

= 24in + 4in + 6in + 4in + 2in

= 28in + 6in + 4in + 2in

= 34in + 4in + 2in

= 38in + 2in

= 40in.

d.

P =

Answer:

Perimeter of the given figure = 30ft.

Explanation:

Length of the side of AB in the given figure = 8ft

Length of the side of BC in the given figure = 3ft

Length of the side of CD in the given figure = 3ft

Length of the side of DE in the given figure = 1ft

Length of the side of EF in the given figure = 3ft

Length of the side of FG in the given figure = 3ft

Length of the side of GH in the given figure = 2ft

Length of the side of HA in the given figure = 7ft

Perimeter of the given figure = Length of the side of AB + Length of the side of BC + Length of the side of CD + Length of the side of DE + Length of the side of EF + Length of the side of FG + Length of the side of GH + Length of the side of HA

= 8ft + 3ft + 3ft + 1ft + 3ft + 3ft + 2ft + 7ft

= 11ft + 3ft + 1ft + 3ft + 3ft + 2ft + 7ft

= 14ft + 1ft + 3ft + 3ft + 2ft + 7ft

= 15ft + 3ft + 3ft + 2ft + 7ft

= 18ft + 3ft + 2ft + 7ft

= 21ft + 2ft + 7ft

= 23ft + 7ft

= 30ft.

Question 2.

Sari draws and labels the squares and rectangle below. Find the perimeter of the new shape.

Answer:

Perimeter of the new shape = 72cm.

Explanation:

Length of the side of AB in the given figure = 6cm

Length of the side of BC in the given figure = 18cm

Length of the side of CD in the given figure = 6cm

Length of the side of DE in the given figure = 6cm

Length of the side of EF in the given figure = 6cm

Length of the side of FG in the given figure = 18cm

Length of the side of GH in the given figure = 6cm

Length of the side of HA in the given figure = 6cm

Perimeter of the new shape = Length of the side of AB + Length of the side of BC + Length of the side of CD + Length of the side of DE + Length of the side of EF + Length of the side of FG + Length of the side of GH + Length of the side of HA

= 6cm + 18cm + 6cm + 6cm + 6cm + 18cm + 6cm + 6cm

= 24cm + 6cm + 6cm + 6cm + 18cm + 6cm + 6cm

= 30cm + 6cm + 6cm + 18cm + 6cm + 6cm

= 36cm + 6cm + 18cm + 6cm + 6cm

= 42cm + 18cm + 6cm + 6cm

= 60cm + 6cm + 6cm

= 66cm + 6cm

= 72cm.

Question 3.

Label the unknown side lengths. Then, find the perimeter of the shaded rectangle.

Answer:

Perimeter of the shaded rectangle = 37in.

Explanation:

Shaded rectangle = BCDG

Length of the side of AB in the given figure = 5in

Length of the side of BC in the given figure = EF – AB = 18in – 5in = 13in

Length of the side of CD in the given figure = FA – DE = 8in – 2in = 6in

Length of the side of DE in the given figure = 2in

Length of the side of EF in the given figure = 18in

Length of the side of FA in the given figure = 8in

Length of the side of GB in the given figure = 6in

Length of the side of GD in the given figure = 13in

Perimeter of the shaded rectangle = Length of the side of BC+ Length of the side of CD + Length of the side of GD + Length of the side of GB

= 13in + 6in + 13in + 6in

= 19in + 13in + 6in

= 31in + 6in

= 37in.