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CBSE Class 9 Answered

find x
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Asked by pranita.krmis | 29 Jun, 2020, 02:01: PM
answered-by-expert Expert Answer
In the figure, AB ll ED
angle ABC = 30o and angle EDC = 70o
Draw a perpendicular line joining B and D.
So, CBD forms a triangle
angle A B D equals 90 degree rightwards double arrow angle A B C plus angle C B D equals 90 degree rightwards double arrow 30 degree plus angle C B D equals 90 degree rightwards double arrow angle C B D equals 60 degree A l s o comma space angle E D C equals 90 degree rightwards double arrow angle E D C plus angle C D B equals 90 degree rightwards double arrow 70 degree plus angle C D B equals 90 degree rightwards double arrow angle C D B equals 20 degree I n space triangle B C D comma space angle B C D plus angle C B D plus angle C D B equals 180 degree rightwards double arrow angle B C D equals 180 degree minus 80 degree equals 100 degree rightwards double arrow x equals 360 degree minus 100 degree equals 260 degree
Answered by Renu Varma | 01 Jul, 2020, 01:36: PM

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