Practice with the help of **Spectrum Math Grade 5 Answer Key Chapter 9 Pretest **regularly and improve your accuracy in solving questions.

## Spectrum Math Grade 5 Chapter 9 Pretest Answers Key

**Check What You Know**

**Circle all the regular polygons.**

Question 1.

Answer:

Regular polygons are polygons whose sides and angles are equal.

**Identify the following quadrilaterals. Write the number that refers to the correct figure.**

Question 2.

rhombus _____________

Answer: 2

A rhombus has two pairs of parallel sides and four equal sides.

Question 3.

rectangle trapezoid _____________

Answer: 4

A rectangle has four right angles, two pairs of parallel sides, and two pairs of equal sides.

Question 4.

trapezoid _____________

Answer: 3

A trapezoid has only one pair of parallel sides.

Question 5.

parallelogram _____________

Answer: 1

A parallelogram has 4 sides, and both sets of opposite sides are parallel.

**Identify the polygons.**

Question 6.

a.

Answer: Rectangle

A rectangle has four right angles, two pairs of parallel sides, and two pairs of equal sides.

b.

Answer: Triangle

A polygon with three sides is called a triangle.

Question 7.

a.

Answer: Square

A square is a rectangle with four equal sides.

b.

Answer: Hexagon

A polygon with six sides is called a hexagon.

**Use a protractor to measure each angle. Then, label each angle right, acute, or obtuse.**

Question 8.

a.

Answer: 25 degrees

The type of angle in the above figure is acute angle.

An acute angle measures less than 90°.

b.

Answer: 140 degrees

The type of angle in the above figure is obtuse angle.

An obtuse angle measures greater than 90° but less than 180°.

Question 9.

a.

Answer: 150 degrees

The type of angle in the above figure is obtuse angle.

An obtuse angle measures greater than 90° but less than 180°.

b.

Answer: 90 degrees

The type of angle in the above figure is right angle.

A right angle measures exactly 90°.

**Use the circle to answer the questions**

Question 10.

Name the circle. _______________

Answer: X

The origin of a circle is a point inside the circle that is the same distance from any point on the circle. A circle is named by its origin.

In the above figure, Name the circle : X

Question 11.

Name the origin of the circle. _____________

Answer: X

The origin of a circle is a point inside the circle that is the same distance from any point on the circle.

Question 12.

Name a radius. _______________

Answer: \(\overline{XW}\), \(\overline{XY}\) or \(\overline{XZ}\)

A radius of a circle is a line segment with one endpoint at the circle.

In the above figure, Name the radius : \(\overline{XW}\), \(\overline{XY}\) or \(\overline{XZ}\)

Question 13.

Name a chord. ______________

Answer: \(\overline{RT}\) or \(\overline{YZ}\)

A chord is a line segment with both endpoints on the circle.

In the above figure, Name the chord : \(\overline{RT}\) or \(\overline{YZ}\)

Question 14.

Name a diameter. _______________

Answer: \(\overline{YZ}\)

A diameter is a chord that passes through the origin of the circle.

In the above figure, Name the diameter : \(\overline{YZ}\)