Classifying Triangles

Front

What is an acute triangle?

Back

A triangle with all three angles measuring less than 90 degrees.

Front

How many acute angles must an acute triangle have?

Back

3

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

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

What is a right triangle?

Back

A triangle that has one angle measuring exactly 90 degrees.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

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

Back

An obtuse triangle.

Front

If a triangle has sides of lengths 5, 5, and 8, what type of triangle is it?

Back

Isosceles.

Front

If a triangle has sides of lengths 3, 4, and 5, what type of triangle is it?

Back

Scalene.