Question

Suppose a triangle has interior angle measures of 50,60, and 70. Which of the following is not an exterior angle measure?

A. 100

B. 110

C. 120

D. 130

Answer 1

answer :

A. 100

step by step calculation

exterior angle plus interior angle add up to 180 degrees

hence:

180-70=110

180-60=120

180-50=130

therefore 100 is not an exterior angle of that triangle

Answer 2

The angle that is an an exterior angle of the triangle is 100 degrees.

A triangle is a polygon that is made up of 3 sides. The sum of the interior angles in a triangle is 180 degrees. Types of triangles are:

• Right-angled triangle
• Equilateral triangle
• Scalene triangle
• Isosceles triangle.

The exterior angle of a triangle is the sum of two interior angles.

The possible exterior angles in the triangle are:

• 50 + 60 = 110
• 50 + 70 = 120
• 60 + 70 = 130

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