Question

5. In the adjoining figure, it is given that angle A = 60°,
CE || BA and angle ECD=65º. Then angle ACB equals.
(a) 60°
(b) 559
(c) 709
(d) 90°​

Answer 1

Answer:

55°

Step-by-step explanation:

R.E.F. Image.

∠A=60

∘

CE || AB

∠ECD=65

∘

(Interior Alternate Angle)

∠BAC=∠ACE

∠ACE=60

∘

∠BCD=180

∘

(linear Angle) or (linear Point)

∠ACB+∠ACE+∠ECD=180

∘

∠ACB=180

∘

−(60+65)

=180

∘

−(125)

∠ACB=55

∘