Angles and Triangles

Front

What is an Isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a Right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is an Acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an Obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is the sum of angles in a triangle?

Back

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

Front

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

Back

It is a Right triangle.

Front

What is a Scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an Equilateral triangle?

Back

A triangle with all three sides of equal length.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

If two angles in a triangle are 30 degrees and 50 degrees, what is the third angle?

Back

The third angle is 100 degrees.