Classifying Triangles

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

Classify a triangle with one angle greater than 90 degrees.

Back

Obtuse triangle.

Front

What defines 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

Classify a triangle with all angles less than 90 degrees.

Back

Acute triangle.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

If a triangle has one right angle, what type of triangle is it?

Back

Right triangle.

Front

What is the difference between acute and obtuse triangles?

Back

Acute triangles have all angles less than 90 degrees; obtuse triangles have one angle greater than 90 degrees.

Front

How can you identify a scalene triangle?

Back

By having all sides of different lengths.

Front

What is the relationship between the sides and angles in an equilateral triangle?

Back

All sides are equal, and all angles are 60 degrees.