Ch 5.1 Practice Flashcard New (AL)

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the total number of degrees in a circle?

Back

A circle has a total of 360 degrees.

Front

Convert 2π/3 radians to degrees.

Back

2π/3 radians is equal to 120 degrees.

Front

What is the formula for finding the length of an arc?

Back

The length of an arc can be found using the formula: \( L = r \theta \), where \( r \) is the radius and \( \theta \) is the angle in radians.

Front

If two angles are complementary, what is the relationship between their measures?

Back

If two angles are complementary, their measures add up to 90 degrees.

Front

If two angles are supplementary, what is the relationship between their measures?

Back

If two angles are supplementary, their measures add up to 180 degrees.

Front

What is the relationship between degrees and radians?

Back

Degrees and radians are two units for measuring angles; 180 degrees is equal to π radians.

Front

How do you find the measure of an angle if you know its supplement?

Back

To find the measure of an angle if you know its supplement, subtract the supplement from 180 degrees.

Front

How do you find the measure of an angle if you know its complement?

Back

To find the measure of an angle if you know its complement, subtract the complement from 90 degrees.