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Find the value of x?

Find the value of x?-example-1
User Nie Xing
by
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1 Answer

12 votes

Answer:

Explanation:

6) Number of sides = n = 7

Sum of all the sides of the mentioned polygon = (n - 2)*180 = (7-2)*180 = 5 *180

= 900

x + 125 + 119 + 117 +145+133 +140 = 900

x + 779 = 900

x = 900 - 779

x = 121

7) Number of sides = n = 5

Sum of all the sides of the mentioned polygon = (n - 2)*180

= 3 *180 = 540

90 + 9x - 6 + 3x +23 + 95 + 7x- 4 = 540

90 - 6 + 23 + 95 - 4 + 9x + 3x + 7x = 540

198 + 19x = 540

19x = 540 - 198

19x = 342

x = 342/19

x = 18

8) Number of sides = n = 8

Sum of all the sides of the mentioned polygon = (n - 2)*180

= 6*180

= 1080

This is a regular polygon (All sides are equal). so all the angles are equal.

One angle = 1080 ÷ 8 = 135

16x +23 = 135

16x = 135 - 23

16x = 112

x = 112/16

x = 7

User Kimm
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