Types of Triangles and Their Properties

Front

If a triangle has all sides of different lengths, what type of triangle is it?

Back

A scalene triangle.

Front

Which triangle is defined by having three angles of less than 90 degrees each?

Back

An acute triangle.

Front

What type of triangle has three angles greater than 60 degrees but less than 90 degrees?

Back

An acute triangle.

Front

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

Back

An obtuse triangle.

Front

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

Back

180 degrees.

Front

What type of triangle has at least two sides of equal length?

Back

An isosceles triangle.

Front

What is a triangle called that has one angle equal to 90 degrees?

Back

A right triangle.

Front

What type of triangle has all sides of equal length?

Back

An equilateral triangle.

Front

What is the relationship between the angles in a triangle?

Back

The sum of the interior angles is always 180 degrees.

Front

If a triangle has one angle that is obtuse, what can be said about the other angles?

Back

The other two angles must be acute.