4.7C (Readiness) - 4th Grade Math STAAR Review

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex). It is measured in degrees.

Front

What is a protractor used for?

Back

A protractor is a tool used to measure angles in degrees.

Front

How do you measure an angle using a protractor?

Back

Align the protractor's center point with the angle's vertex, then read the degree measurement where one ray intersects the protractor.

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

If angle TUV measures 60°, what type of angle is it?

Back

Angle TUV is an acute angle because it measures less than 90 degrees.

Front

How do you find the measure of an angle if you know the total degrees in a straight line?

Back

To find the measure of an angle on a straight line, subtract the known angle from 180 degrees.

Front

What is the sum of angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.