Triangle Sum

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 type of triangle has all sides of equal length?

Back

An equilateral triangle.

Front

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

Back

An obtuse triangle.

Front

What type of triangle has one angle equal to 90 degrees?

Back

A right triangle.

Front

What is an acute angle?

Back

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

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two sides of equal length.

Front

If one angle of a triangle is 90 degrees, what can you say about the other two angles?

Back

The other two angles must be acute and their sum must be 90 degrees.

Front

How do you find the measure of the third angle in a triangle if you know the other two angles?

Back

Subtract the sum of the two known angles from 180 degrees.