Classifying Triangles

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90 degrees.

Front

How many angles in an acute triangle are acute?

Back

All three angles in an acute triangle are acute (less than 90 degrees).

Front

What defines an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides are of different lengths.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides are equal in length and all angles are 60 degrees.

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is always 180 degrees.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle equal to 90 degrees.

Front

What is the difference between acute and obtuse triangles?

Back

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

Front

Can a triangle be both isosceles and obtuse?

Back

Yes, a triangle can be both isosceles and obtuse if it has two equal sides and one angle greater than 90 degrees.

Front

What type of triangle has one right angle?

Back

A right triangle has one right angle (90 degrees).