paublotheduck paublotheduck

13-09-2018
Mathematics

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What is the value of x?

What is the value of x class=

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datgamer13 datgamer13

13-09-2018

Well, the sum of the interior angles of a heptagon is 900°. So, x = ......

First we add all the angles we do know: 139 + 121 + 125 + 126 + 158 + 120.

139 + 121 = 260 260 + 125 = 385 385 + 126 = 511 511 + 158 = 669 669 + 120 = 789

Then, subtract this number from 900:

900 - 789 = 111 Which means that x = 111°!

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