Question

Determine the measure of the interior angle at vertex C

Answer 1

The measure of the interior angle at vertex C is D. 144.

How to calculate the angle?

Based on the information given, the angle will be calculated thus:

8x + 8x + 8x + 3x + 3x = (5 - 2) × 180

30x = 540

Divide both side by 30

30x/30 = 540/30

x = 18

Therefore, at vertex C, we have 8x. This will be:

= 8x

= 8 × 18

= 144

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