2 years ago

Please help I’m not good at triangle angles

Mathematics

1 answer:

wlad13 [49]2 years ago

6 0

Answer:

Step-by-step explanation:

Two of the angles are just numbers and you add them.

The third is a term and you add it along with the other two.

The total is always 180 for a triangle.

80 + 58 + 5x - 3 = 180

138 + 5x - 3 = 180 Combine on the left

135 + 5x = 180 Subtract 135 from both sides

5x = 180 - 135 Combine the right

5x = 45 Divide by 5

x = 9

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