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Triangle Review (Math please help)

Triangle Review (Math please help)-example-1

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Answer:

Explanation:

The lower left angle of the triangle is vertically opposite to 4x + 17. Therefore the third angle of the triangle is also 4x + 17.

x + 23 + 4x + 17 + 80 = 180 All triangles have 180o

5x + 40 + 80 = 180 Collect like terms

5x + 120 = 180 Subtract 120 from both sides

- 120 -120

5x = 60 Divide by5

5x/5 = 60/5

x = 12

But you are asked for Angle A

A = x + 23

A = 12 + 23

A = 35

User Patrick Montelo
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