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CBSE Class 9 Answered

AB and CD intersect at O. If AOD: BOD = 5: 7, find all the angles.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer
Let AOD = 5x and BOD = 7x
AOD + BOD =5x + 7x = 180o       (linear pair)
x = 15o
AOD = 515 = 75o and BOD = 7x = 105o
BOC = AOD and AOC = BOD     (vertically opposite angles are equal)
Hence BOC = AOD = 75o and AOC = BOD = 105o
Answered by | 04 Jun, 2014, 03:23: PM

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