Question

In a parallelogram ABCD,if angle A =(3x-15) and angle D=(2x+5),then find the value of x

Answer 1

Step-by-step explanation:

A=3x-15

D=2x+5

A=D

3x-15=2x+5

3x-2x= 5+15

x=20

Answer 2

Answer:

Angle A = 3x - 15° =3×38°-15° = 114° - 15° = 99°

Angle D = 2x+5° = 2×38°+5°=76°+5° =81°

Angle A = Angle C = 99°(Opposite Angles)

Angle D = Angle B = 81°

Step-by-step explanation:

In // gm ABCD,

angle A = (3x -15)

angle D = (2x +5)

Angle A + Angle D = 180° ( Sum of the allied angles is equal to 180°)

=> (3x -15°) + (2x +5°) =180°

=> 5x -10° = 180°

=> 5x = 180°+10°

=> x = 190°/ 5 = 38°