Angles & Triangle Inequality 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 the sum of the interior angles of a triangle?

Back

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

Front

What is the Triangle Inequality Theorem?

Back

The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

If one side of a triangle measures 14 cm and another side measures 6 cm, what is the range of possible lengths for the third side?

Back

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 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

How do you find the measure of an angle when two lines intersect?

Back

When two lines intersect, the opposite angles (vertical angles) are equal, and the adjacent angles are supplementary (sum to 180 degrees).

Front

What is the measure of angle LMO if it is given as 25 degrees?

Back

Angle LMO measures 25 degrees.

Front

What is the measure of angle HGF if it is given as 86 degrees?

Back

Angle HGF measures 86 degrees.