Elise is measuring the angles of a triangle. She measures the first two and gets 30° and 100°. What should be the measure of the third angle?

A) 50°

B) 60°

C) 130°

D) 230°

Question

Mathematics

Yuliana Gould

19 May, 09:28

Elise is measuring the angles of a triangle. She measures the first two and gets 30° and 100°. What should be the measure of the third angle?

A) 50°

B) 60°

C) 130°

D) 230°

+4

Answers (1)

Know the Answer?

Kaylie Cooke · Answer 1

The sum of angles in a triangle is 180°.

To obtain the third angle (let's call it x), we simply calculate thus:

30° + 100° + x = 180°

130° + x = 180°

x = 180° - 130°

x = 50° ... (A)

Elise is measuring the angles of a triangle. She measures the first two and gets 30° and 100°. What should be the measure of the third angle?A) 50°B) 60°C) 130°D) 230°

Elise is measuring the angles of a triangle. She measures the first two and gets 30° and 100°. What should be the measure of the third angle?

A) 50°

B) 60°

C) 130°

D) 230°