Question

In Fig. 10.21, lines AB, CD
and EF intersect at O. Find
the measures of angle AOC,
angle COF, angle DOE and angle BOF.​

Answer 1

Answer:

Angle AOC =angle BOD=35 ( by vertically opposite angle)

Angle COF =angle EOD= 180 - (35 +40)=105 (by linear pair)

Angle BOF =angle AOE =40

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Answer 2

Answer:

Angle aoc = angle bod=35degree(v.o.a)

Angle bof = angle Ade =40 degree(v.o.a)

Angle cdf= 180 degree-(35+40)

= 180-75

=105

Aoc = 35 degree

Bof = 40 degree

Cof = 105 degree