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Question

In the figure, if A+B+C+D+E+F=k× right angle, then k is :
84171_2dc17cfe585a451fb0720a5ab1cf0521.png

A
2
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B
3
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C
4
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D
5
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Solution

The correct option is C 4
In ABC

A+B+C=180 [Sum of interior angles of triangle is 180] --- ( 1 )

In DEF

D+E+F=180 [Sum of interior angles of triangle is 180] ---( 2 )

A+B+C+D+E+F=180+180 [Adding ( 1 ) and ( 2 )]

A+B+C+D+E+F=360

A+B+C+D+E+F=k×(rightangle).

k=360o90o

k=4

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