The angles of a triangle measure 30°, 70°, and x. The Triangle Angle Sum Theorem states that the sum of the angles inside a triangle must equal 180°. Based on this theorem, what is the measure of angle x?

Question

(1 point)
O 100°
O 80°
O 280°
O 110°

Answer 1

To find the measure of angle x, we can use the Triangle Angle Sum Theorem.

30° + 70° + x = 180°

Combine the known angles:

100° + x = 180°

Subtract 100° from both sides:

x = 80°

Therefore, the measure of angle x is 80°.

Correct answer: O 80°