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2 years ago

Find the value of y in the diagram below.

Mathematics

1 answer:

Alja [10]2 years ago

5 0

Answer:

The answer to your question is: y = 80°

Step-by-step explanation:

The sum of the internal angles in a polygon is = 180°(n - 2)

= 180° (6 - 2)

= 180(4)

= 720°

y° + y° + 2(2y -20) + 2(2y -20) = 720

2y° + 4(2y -20) = 720

2y° + 8y -80 = 720

10y = 720 + 80

10 y = 800

y = 800 / 10

y = 80°

2y - 20 = 2(80) -20 = 160 -20 = 140

80° + 80° * 140 + 140 + 140 + 140 = 720°

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