This handy **Spectrum Math Grade 4 Answer Key Chapter 8 Posttest**Ā provides detailed answers for the workbook questions.

## Spectrum Math Grade 4 Chapter 8 Posttest Answers Key

**Check What You Learned**

**Draw the line (or lines) of symmetry if the shape is symmetrical.**

Question 1.

a.

Answer:

**Symmetrical**

Explanation:

The above given figure has only one line of symmetry. So, drawn the line of symmetry.

b.

Answer:

**Symmetrical**

Explanation:

The above given figure has only one line of symmetry. So, drawn the line of symmetry.

c.

Answer:

**Symmetrical**

Explanation:

The above given figure has only one line of symmetry. So, drawn the line of symmetry.

d.

Answer:

**Symmetrical**

Explanation:

The above given figure has only one line of symmetry. So, drawn the line of symmetry.

**Identify the lines as perpendicular, parallel, or intersecting.**

Question 2.

a.

Answer:

Type of Lines:Ā **Parallel**

Explanation:

The above given pair of lines are parallel lines. The two given lines are not intersecting at any point and are always the same distance apart.

b.

Answer:

Type of Lines:Ā **Perpendicular**

Explanation:

The above given pair of lines are perpendicular lines. The two given lines are intersecting and forming a right angle at their intersection. Hence given two lines are perpendicular to each other.

c.

Answer:

Type of Lines:Ā **Perpendicular**

Explanation:

The above given pair of lines are perpendicular lines. The two given lines AB and BC are intersecting and forming a right angle at their intersection point B. Hence AB and BC are perpendicular to each other.

d.

Answer:

Type of Lines:Ā **Parallel**

Explanation:

The above given pair of lines are parallel lines. The two given lines EF and HG are not intersecting at any point and are always the same distance apart.

**Draw each angle.**

Question 3.

a. ā QRS

Answer:

Explanation:

The given angle ā QRS is drawn as we can observe in the above image.

b. ā 567

Answer:

Explanation:

The given angle ā 567 is drawn as we can observe in the above image.

c. ā DEF

Answer:

Explanation:

The given angle ā DEF is drawn as we can observe in the above image.

**Identify the quadrilateral.**

Question 4.

Answer:

**Trapezoid**

Explanation:

A quadrilateral is a polygon with four sides. The above given quadrilateral is trapezoid. A trapezoid has two sides that are parallel to each other.

**Identify the triangle.**

Question 5.

Answer:

**Right Triangle**

Explanation:

A triangle is a polygon with 3 sides. The above given triangle is right triangle. A right triangle has only one right angle.