4.1 Classifying Triangles Warm-Up

Front

What is an acute triangle?

Back

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

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle 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 an equilateral triangle?

Back

A triangle where all three sides are of equal length.

Front

What is an isosceles triangle?

Back

A triangle that has at least two sides of equal length.

Front

What is a scalene triangle?

Back

A triangle where all three sides are of different lengths.

Front

How do you classify triangles by angles?

Back

Triangles can be classified as acute, obtuse, or right based on their angles.

Front

How do you classify triangles by sides?

Back

Triangles can be classified as equilateral, isosceles, or scalene based on the lengths of their sides.

Front

What is the sum of the angles in any triangle?

Back

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