Question

If angle A=60° and CE is parallel to BA and ECD=65°, Find angle ACB

Answer 1

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7th

Maths

The Triangle and Its Properties

Exterior Angle of a Triangle

In the adjoining figure, it...

MATHS

In the adjoining figure, it is given that  ∠A=60,  CE∥BA  and  ∠ECD=65.  Then  ∠ACB  equals.



A

60

B

55

C

70

D

90

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ANSWER

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∘



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