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Question

In figure if AD=6 cm,DB=9 cm,AE=8 cm and EC=12 cm and ADE=48o. Find ABC.
1257595_358f6b6b91ed4345a531e6a6d4a4d7e9.png

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Solution

In ADE, and ABC

AD=6,AB=AD+DB=6+9=15ADAB=615=25

AE=8,AC=AE+EC=8+12=20AEAC=820=25

ADAB=AEAC,DAE=BAC(common angle)

As sides are proportional and an angle is equal

ABCADE

ABC=ADE=48

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