Question

In trapenzium ABCD. Side AB is parreall to side DC.if A =x°, D=(3x-20°) find the value of x

Answer 1

Answer:

AB is parallel to CD

AD is a transversal

Angle A + Angle D =180 degrees

x+ 3x-20= 180

4x-20= 180

4x=180+20

4x= 200

x=200/4

x=50

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Step-by-step explanation:

Answer 2

Answer: x = 50°

Step-by-step explanation:

GIVEN,

Angle A = x°

Angle D = (3x-20°)

∵ AB is parallel to CD and AD is transversal,

  Angle A + Angle D = 180° (Sum of co-interior angles is equal to 180°

  x° + (3x-20°) = 180°

  4x° - 20° = 180°

  4x° = 180° + 20°

  4x° = 200°

     x = 200° / 4

     x = 50°

∴ The value of x = 50°