Question

Q. 9 - Find the sum of a + b + c + d in the given figure​

Answer 1

Answer:

sum of a + b + c + d is 360°

Step-by-step explanation:

a + b + c + d = 360°

60 + b + 105 + 75= 360°

240+ b = 360°

b = 360° - 240

b= 120°

Answer 2

Answer:

Answer is 360

Step-by-step explanation:

105 + 75 + 60 + X = 360

( In parallelogram the sum of all angles is 360)

240 + X = 360

X = 360 - 240

X = 120

Now,

• c + 105 = 180 ( linear pair )

c = 75

• d + 75 = 180 ( linear pair )

d = 105

• a + 60 = 180 ( linear pair )

a = 120

• 120 + b = 180 ( linear pair )

b = 60

Sum of a + b + c + d =

120 + 60 + 75 + 105

= 360