Question

in the given figure, x:y=3:2 & y+z=100 and ab is parallel to cd find angle a​

Answer 1

Answer:

80°

Step-by-step explanation:

AB // CD

a = p ( alternate angles )

p, y and z are angles on a straight line

therefore,

p+y+z = 180

p + 100 = 180 ( y+z = 100 given)

p = 180 - 100

p = 80°

p = a = 80° ( proved above )

a = 80° ANSWER

Answer 2

Answer:

80°

Step-by-step explanation:

AB // CD

a = p ( alternate angles )

p, y and z are angles on a straight line

therefore,

p+y+z = 180

p + 100 = 180 ( y+z = 100 given)

p = 180 - 100

p = 80°

p = a = 80° ( proved above )

a = 80° ANSWER