Identify triangles by sides and angles.

Front

What is the sum of the angles in a triangle?

Back

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

Front

What type of triangle has all sides of equal length?

Back

An equilateral triangle.

Front

What type of triangle has two sides of equal length?

Back

An isosceles triangle.

Front

What type of triangle has no sides of equal length?

Back

A scalene triangle.

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

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

Front

What is a right triangle?

Back

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

Front

If one angle of a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

In an isosceles triangle, if one angle is 40 degrees, what are the measures of the other two angles?

Back

The other two angles are each 70 degrees.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.