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alex41 [277]
3 years ago
7

I WILL MARK BRAINIEST please answer question 5

Mathematics
2 answers:
aalyn [17]3 years ago
6 0

Answer:

a = 150

Step-by-step explanation:

A octagon is 1080 degrees. The half circles are showing which angles are the same. So all the red circles are 120 degrees. To find the green circles, multiply 120 by 4 for the total of the four angles and then subtract it from 1080:

120(4) = 480

1080 - 480 = 600

So 600 is the total of all the green half circles added together, so divide 600 with 4 because there are four green half circles.

600/4 = 150

Marat540 [252]3 years ago
4 0

Answer:

a = 150

Step-by-step explanation:

The sum of the internal angles of an octagon is 1080°.

4a+4(120)=1080 (There are four 120^{\circ} and 4 a^{\circ}, they sum to 1080°)

4a + 480 = 1080

4a = 600

a = 150

Hope this helps :)

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