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Question

In the given figure, AB || DC, BAD=900, CBD=280 and BCE=650. Then ABD=?
1066683_493970685a984d19a73a75742113815b.png

A
320
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B
370
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C
430
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D
530
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Solution

The correct option is C 370
BDC+DBC=65

(Sumoftwooppositinterioranglesofatriangle=exteriorangle)

BDC+28=65

BDC=37

BAD+ADC=180(sumofcointeriorangle=180)

ADC=90

ADB=ADCBDC=9037=53

InABD:

ADB+ABD+DAB=180

53+ABD+90=180

ABD=180143=37

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