Triangle Angles

Front

What is the sum of the angles in a triangle?

Back

The sum of the 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 do you call a triangle with all three angles less than 90 degrees?

Back

It is called an acute triangle.

Front

What do you call a triangle with one angle greater than 90 degrees?

Back

It is called an obtuse triangle.

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 50 degrees and 60 degrees, what is the third angle?

Back

The third angle is 70 degrees.

Front

What is an exterior angle of a triangle?

Back

An exterior angle is equal to the sum of the two opposite interior angles.

Front

What is the relationship between the angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are equal.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is a scalene triangle?

Back

A scalene triangle has all sides of different lengths and all angles of different measures.