Classifying Triangles

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90 degrees.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

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

Back

180 degrees.

Front

Can a triangle have two obtuse angles?

Back

No, a triangle can only have one obtuse angle.

Front

What are the angle measures of a right triangle?

Back

One angle is exactly 90 degrees, and the other two angles are acute.

Front

Which of the following sets of angles can form a triangle: 120°, 50°, 20°?

Back

No, because the sum exceeds 180 degrees.

Front

Which of the following sets of angles can form a triangle: 30°, 50°, 80°?

Back

Yes, because the sum equals 180 degrees.

Front

What type of triangle is formed by angles measuring 26°, 59°, and 95°?

Back

Obtuse scalene.