Classifying Triangles

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

What is an acute triangle?

Back

A triangle where all angles are less than 90 degrees.

Front

What is a right triangle?

Back

A triangle with one angle exactly equal to 90 degrees.

Front

What is an equilateral triangle?

Back

A triangle where all three sides are equal in length and all angles are equal to 60 degrees.

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 where all three sides are of different lengths.

Front

How can you identify an obtuse triangle?

Back

Look for one angle that is larger than 90 degrees.

Front

How can you identify an acute triangle?

Back

Check that all angles are less than 90 degrees.

Front

How can you identify a right triangle?

Back

Look for one angle that is exactly 90 degrees.

Front

How can you identify an equilateral triangle?

Back

All sides and angles are equal.