Angles of Triangles

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle where one angle is greater than 90 degrees.

Front

What is an equilateral triangle?

Back

A triangle where all three sides and all three angles are equal.

Front

What is the sum of the angles in a triangle?

Back

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

Front

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

Back

It is a right triangle.

Front

How do you find the third angle of a triangle if two angles are known?

Back

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

Front

What is a scalene triangle?

Back

A triangle where all three sides and all three angles are different.

Front

What is an isosceles triangle?

Back

A triangle that has at least two sides of equal length and two equal angles.

Front

What is an equiangular triangle?

Back

A triangle where all three angles are equal, and each angle measures 60 degrees.