This handy Spectrum Math Grade 4 Answer Key Chapter 7 Lesson 7.9 Measuring Perimeter provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 7 Lesson 7.9 Measuring Perimeter Answers Key
Perimeter is the distance around a shape.
To calculate perimeter, add together the lengths of all the sides.
Perimeter = 17 in. + 10 in. + 17 in. + 10 in.
Perimeter = 59 in.
Find the perimeter of each shape.
Question 1.
a.
___________ m
Answer:
The perimeter of each shape = 14 m
Explanation:
Given,
Length of the side = 4 m
Length of the other side = 3 m
The perimeter of the given shape = 4 m + 4 m + 3 m + 3 m
= 14 m
b.
____________ ft.
Answer:
The perimeter of each shape = 30 ft.
Explanation:
Given,
Length of the side = 10 ft
Width of the side = 5 ft
Perimeter = 10 ft + 10 ft + 5 ft + 5 ft
= 30 ft
c.
____________ cm
Answer:
The perimeter of the given shape = 28 cm.
Explanation:
Given,
Side of the triangle = 13 cm
The base of the triangle = 2 cm
Perimeter of the triangle = 13 + 13 + 2
= 28 cm
Question 2.
a.
_____________ yd.
Answer:
The perimeter of the triangle = 225 yd.
Explanation:
Given,
The sides of the triangle are 75 yds, 50 yd, and 100 yds.
The perimeter of the triangle = a + b + c
= 75 + 50 + 100
= 225 yd.
b.
_____________ mm
Answer:
Perimeter of the given shape is 120 mm.
Explanation:
Given,
Length of the rectangle = 50 mm
Width of the rectangle = 10 mm
Perimeter = 50 + 50 + 10 + 10
= 120 mm
c.
______________ ft.
Answer:
Perimeter of the given triangle is 55 ft.
Explanation:
Given,
The sides of the triangle are 25 ft, 13 ft, and 17 ft.
Perimeter of the triangle is 25 + 13 + 17
= 55 ft
Question 3.
a.
_____________ km
Answer:
Perimeter of the given figure is 42 km
Explanation:
Given sides of the figure are 15 km, 15 km, 7 km, and 5 km
Perimeter of the figure is 15 + 15 + 7 + 5
= 42 km
b.
_____________ in.
Answer:
The perimeter of the given figure is 34 in.
Explanation:
Given,
The sides of the figure are 10 in, 10 in, 8 in, and 6 in
Perimeter of the figure is 10 + 10 + 8 + 6
= 34 in.
c.
___________ yd.
Answer:
The perimeter of the given figure is 150 yd.
Explanation:
Given,
The sides of the trapezium are
a = 30 yd, b = 20 yd, c= 60 yd and d = 40 yd
perimeter of the figure is a + b + c + d
Perimeter = 30 + 20 + 60 + 40
= 150 yd.