1.

In the given figure, what value of x will make AOB a straight line?(a) x = 50 (b) x = 100 (c) x = 60 (d) x = 80

Answer»

(d) x = 80

Because,

It is given that the angles of the side be 55o, 45o and (x)o.

= x + 55o + 45o = 180 [∵ Linear pair]

= x = 180 – 100

= x = 80



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