Classifying Triangles

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a right triangle?

Back

A triangle with one angle equal to 90 degrees.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an acute triangle?

Back

A triangle with all angles less than 90 degrees.

Front

What defines an equilateral triangle?

Back

A triangle with all three sides of equal length.

Front

How can you identify an isosceles right triangle?

Back

It has one 90-degree angle and two equal sides.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

Can a triangle be both obtuse and isosceles?

Back

Yes, an obtuse isosceles triangle has one obtuse angle and two equal sides.

Front

Can a triangle be both scalene and acute?

Back

Yes, a scalene acute triangle has all sides different and all angles less than 90 degrees.