Classify Triangles and Triangle Sum

Find the measure of the indicated angle.

Solve for x.

• 7

• 9

• -11

• -8

Solve for x.

• 6

• 5

• -11

• 4

• acute

• obtuse

• right

• acute

• obtuse

• right

• equilateral

• isosceles

• scalene

• equilateral

• isosceles

• scalene

A triangle has side lengths of 15 centimeters, 11 centimeters, and 9 centimeters. What kind of triangle is it?

• equilateral

• isosceles

• scalene

Name this triangle.

• Right, Isosceles

• Scalene, acute

• Isosceles, acute

• Equilateral, obtuse

What is the third angle of a triangle whose 1st angle is 34 and 2nd angle is 101?

• 32

• 39

• 45

• 54