diamondthomassss
diamondthomassss diamondthomassss
  • 12-11-2020
  • Mathematics
contestada

the polygon is regular if each of its side has the same length. find the perimeter of the regular polygon.

18, 19, 20

helpp!!!!

the polygon is regular if each of its side has the same length find the perimeter of the regular polygon 18 19 20 helpp class=

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hydrgn
hydrgn hydrgn
  • 12-11-2020
18. 5-2x = -4x+9
2x = 4
x = 2
perimeter = length of one side x 3
perimeter = [5-2(2)] x 3
= 3

19. 3(x-1) = 5x-6
3x-3 = 5x-6
-2x = -3
x = 1.5
perimeter = [3(1.5-1)] x 5
=7.5

20. 4/3x-⅓ = x+7
4x-1 = 3x+21 (multiply throughout by 3 to get rid of denominator on LHS)
x = 22
perimeter = (22+7) x 6
= 29 x 6
= 174
^ not sure about qn20 because i can’t tell if it’s x+7 or x divided by 7 it’s kinda blurry
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