5.1 Triangles Practice

Front

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

Back

180 degrees

Front

If one angle of a triangle is 56 degrees and another is 70 degrees, what is the measure of the third angle?

Back

54 degrees

Front

What is the measure of a right angle?

Back

90 degrees

Front

In a triangle, if one angle measures 91 degrees, what can you say about the other two angles?

Back

They must sum to 89 degrees.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

Isosceles triangle.

Front

What is an equilateral triangle?

Back

A triangle where all three sides and angles are equal.

Front

How do you find the measure of an unknown angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the definition of a triangle?

Back

A polygon with three edges and three vertices.

Front

If a triangle has angles measuring 30 degrees and 60 degrees, what is the measure of the third angle?

Back

90 degrees.