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Nadya [2.5K]
3 years ago
13

Determine the measure of the interior angel at vertex A

Mathematics
2 answers:
MrRa [10]3 years ago
8 0

C. 84*

If incorrect, my apologies.

olga2289 [7]3 years ago
7 0

The total of interior angles of a polygon is found using the formula 180 x (n-2) where n is the number of sides.

The above figure has 7 sides, so the total of the interior angles is: 180 x (7-2) = 180 x 5 = 900 degrees.

Find X:

Total all angles: 2x+4x+4x+4x+4x+2x+10x = 900

30x = 900

X = 900/30

x = 30

Angle A = 2x = 2*30 = 60 degrees

The answer is A.

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