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 equiangular triangle?

Back

A triangle where all three angles are equal, each measuring 60 degrees.

Front

What is a scalene triangle?

Back

A triangle with no congruent sides.

Front

What is an isosceles triangle?

Back

A triangle with at least two congruent sides.

Front

What is an equilateral triangle?

Back

A triangle with all three sides congruent.

Front

How can you identify a right triangle?

Back

By using the Pythagorean theorem: a² + b² = c², where c is the hypotenuse.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

What is the difference between scalene and isosceles triangles?

Back

Scalene triangles have no congruent sides, while isosceles triangles have at least two congruent sides.