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Please help:( geometry, I don’t understand

Please help:( geometry, I don’t understand-example-1
User Vizzdoom
by
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1 Answer

13 votes
13 votes

Answer:

d = 42

Explanation:

All angles must add up to 180 degrees because it's a line.

d + 3d + 5 + 7 = 180

4d + 12 = 180

4d = 168

d = 42

User Lawchit
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