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Question

In a trapezium ABCD, AB | | CD. If A=60 then D = ?

A
100
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B
120
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C
70
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D
300
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Solution

The correct option is B 120
Given-
ABCD is a trapezium.
CDAB.
BAD=60o.
To find out-
ADC=?.
Solution-
CDAB and AD is the transversal.
BAD+ADB=180o ( the sum of the one sided internal angles=180o.
ADB=180oBAD=180o60o=120o.
So ADB=120o.
Ans- Option B.


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