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Find the values of x and y for the isosceles trapezoid

Find the values of x and y for the isosceles trapezoid-example-1
User Scooz
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1 Answer

6 votes

Answer:

  • x = 15
  • y = 3

Explanation:

If the trapezoid is isosceles, angles A and C are supplementary, so ...

... (4x+4) +(7x+11) = 180

... 11x +15 = 180 . . . . . . collect terms

... 11x = 165 . . . . . . . . . subtract 15

... x = 15 . . . . . . . . . . . . divide by the coefficient of x

And angles C and E are congruent.

... 4·15 +4 = 21y +1

... 63 = 21y . . . . . subtract 1

... 3 = y . . . . . . . . divide by the coefficient of y

User Chernevik
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