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andrezito [222]
4 years ago
10

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

Mathematics
2 answers:
Georgia [21]4 years ago
8 0

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

dangina [55]4 years ago
6 0

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

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