Triangles - classifying and finding missing angles

Front

What is the sum of the angles inside a triangle?

Back

180°

Front

What type of triangle has one right angle?

Back

Right Triangle

Front

What type of triangle has all sides of equal length?

Back

Equilateral Triangle

Front

What type of triangle has all angles less than 90 degrees?

Back

Acute Triangle

Front

What type of triangle has one angle greater than 90 degrees?

Back

Obtuse Triangle

Front

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

Back

60°

Front

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

Back

Right Triangle

Front

In a right triangle, what is the relationship between the angles?

Back

One angle is 90°, and the other two angles sum to 90°.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.