Lessons 4.1, 4.2, 4.6 Recap

Front

What is the sum of the interior angles of a triangle?

Back

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

Front

If each angle in an equilateral triangle is the same, what is the measure of each angle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the formula to find the measure of an unknown angle in a triangle?

Back

The formula is x + y + z = 180 degrees, where x, y, and z are the measures of the angles.

Front

How do you find the length of a side in a right triangle using the Pythagorean theorem?

Back

The Pythagorean theorem states that a² + b² = c², where c is the hypotenuse.

Front

What is the definition of a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is the relationship between complementary angles?

Back

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

Front

What is the relationship between supplementary angles?

Back

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

Front

If one angle measures 30 degrees, what is the measure of its complement?

Back

The complement of a 30-degree angle is 60 degrees.

Front

If one angle measures 110 degrees, what is the measure of its supplement?

Back

The supplement of a 110-degree angle is 70 degrees.

Front

What is the definition of an acute angle?

Back

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