Question

two angles of a triangle measure 12 degrees and 40 degrees. what is the meaure of the third angle of he triangle

Answer 1

Answer:

$Angle\ 3 = 128$

Step-by-step explanation:

Given

Angle 1 = 12

Angle 2 = 40

Required

Determine the third angle

The angles of a triangle is such that;

$Angle\ 1 + Angle\ 2 + Angle\ 3 = 180$

Substitute values for Angle 1 and 2

$12 + 40 + Angle\ 3 = 180$

$52 + Angle\ 3 = 180$

Subtract 52 from both sides

$Angle\ 3 = 180 - 52$

$Angle\ 3 = 128$

Hence, the measure of the third angle is 128 degrees

Answer 2

Answer: 128 degrees

Step-by-step explanation: I hope this helps:)

I know that this is correct because I got this question on a test and I got it correct xd