Geometric measurement: understand concepts of angle and measure angles

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4th Grade Math › Geometric measurement: understand concepts of angle and measure angles

Questions 1 - 10

1

Solve for x.

52degrees

$38^\circ$

$36^\circ$

$34^\circ$

$32^\circ$

$30^\circ$

Explanation

To solve for x we subtract.

2

Solve for x.

52degrees

$38^\circ$

$36^\circ$

$34^\circ$

$32^\circ$

$30^\circ$

Explanation

To solve for x we subtract.

3

Solve for x.

45degrees

$45^\circ$

$40^\circ$

$50^\circ$

$35^\circ$

$30^\circ$

Explanation

Because of the square in the corner of the angle we have a $90^\circ$ angle. To find the missing piece of the angle we subtract.

4

Solve for x.

100degrees

$100^\circ$

$110^\circ$

$120^\circ$

$130^\circ$

$140^\circ$

Explanation

To find the value of x we add both of the known angles together.

5

Solve for x.

180 degrees

$90^\circ$

$80^\circ$

$100^\circ$

$85^\circ$

$95^\circ$

Explanation

The angle is a straight line. A straight line is $180^\circ$ . To find the missing angle we subtract.

6

Solve for x.

180 degrees

$90^\circ$

$80^\circ$

$100^\circ$

$85^\circ$

$95^\circ$

Explanation

The angle is a straight line. A straight line is $180^\circ$ . To find the missing angle we subtract.

7

What is an angle that measures less than $90^\circ$ called?

An acute angle

An obtuse angle

A right angle

Explanation

By definition, an acute angle is any angle that measures less than $90^\circ$ .

8

Solve for x.

45degrees

$45^\circ$

$40^\circ$

$50^\circ$

$35^\circ$

$30^\circ$

Explanation

Because of the square in the corner of the angle we have a $90^\circ$ angle. To find the missing piece of the angle we subtract.

9

Solve for x.

100degrees

$100^\circ$

$110^\circ$

$120^\circ$

$130^\circ$

$140^\circ$

Explanation

To find the value of x we add both of the known angles together.

10

What is an angle that measures less than $90^\circ$ called?

An acute angle

An obtuse angle

A right angle

Explanation

By definition, an acute angle is any angle that measures less than $90^\circ$ .

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