Angles in a Triangle

Front

What is an acute triangle?

Back

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

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an equilateral triangle?

Back

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

Front

What is an isosceles triangle?

Back

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

Front

What is a scalene triangle?

Back

A triangle where all three sides are of different lengths.

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

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the classification of a triangle with two equal angles?

Back

It is classified as an isosceles triangle.

Front

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

Back

It is a right triangle.