5.1 Angles of Triangles

Front

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

Back

180 degrees.

Front

What is an exterior angle of a triangle?

Back

An angle formed by one side of the triangle and the extension of an adjacent side.

Front

The exterior angle of a triangle is equal to the sum of which angles?

Back

The two opposite interior angles.

Front

What type of triangle has all sides of different lengths?

Back

Scalene triangle.

Front

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

Back

Isosceles triangle.

Front

What type of triangle has all sides of equal length?

Back

Equilateral triangle.

Front

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

Back

Right triangle.

Front

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

Back

Use the equation: x + y + z = 180 degrees, where x, y, and z are the angles.

Front

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

Back

60 degrees.

Front

If two angles of a triangle are 50 degrees and 60 degrees, what is the measure of the third angle?

Back

70 degrees.