INTERIOR ANGLES of TRIANGLES

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°.

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60°.

Front

How do you find the measure of a missing angle in a triangle?

Back

To find the measure of a missing angle, subtract the sum of the known angles from 180°.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two equal sides and two equal angles.

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle are related such that their measures add up to 180°.

Front

If two angles of a triangle are 50° and 60°, what is the measure of the third angle?

Back

The third angle measures 70° (180° - 50° - 60° = 70°).

Front

What is the definition of an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90°.

Front

What is the definition of an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90°.

Front

How can you determine if a triangle is valid based on its angles?

Back

A triangle is valid if the sum of its angles equals 180°.