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Bingel [31]
3 years ago
15

Need number 15 please help! NO LINKS!!!!!1

Mathematics
1 answer:
daser333 [38]3 years ago
8 0

Answer:

<h3>14.</h3>

<u>All sides of a rhombus are equal.</u>

  • 9a - 18 = 3a + 15
  • 6a = 33
  • 3a = 16.5
  • VW = 16.5 + 15 = 31.5
<h3>15.</h3>
  • Diagonal of a rhom<em>bus are perpendicular to each other.</em>
  • <em>Diagonals are angle bisectors.</em>
  • <em>Adjacent angles are supplementary.</em>
  • m∠XZW = 10b - 5
  • 10b - 5 = 90
  • 10b = 95
  • b = 9.5
  • m∠WVY = 4b + 10 = 4*9.5 + 10 = 48°
  • m∠VWX = 180° - 48° = 132°
  • m∠WYX = 1/2m∠VWX = 1/2(132°) = 66°
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