$∠$ 1 and $∠$ 2 form linear pair. If $∠$ 1 = 40°, find $∠$ 2.

40°

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140°

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100°

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80°

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Solution

The correct option is B 140°

Given, $∠$ 1 = 40°.
$∠$ 1 + $∠$ 2 = 180° (Linear Pair)
40° + $∠$ 2 = 180°.
$∠$ 2 = 180° - 40° = 140°.

Hence, $∠$ 2 = 140°.

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Similar questions

Class interval	$0 - 20$	$20 - 40$	$40 - 60$	$60 - 80$	$80 - 100$	$100 - 120$	$120 - 140$
Frequency	$4$	$15$	$23$	$12$	$16$	$8$	$2$

50

f_{1}

f_{2}

Class	0-20	20-40	40-60	60-80	80-100	Total
Frequency	17	28	$f_{1}$	24	$f_{2}$	120

Classes:	$0 - 20$	$20 - 40$	$40 - 60$	$60 - 80$	$80 - 100$	$100 - 120$	$120 - 140$
Frequency:	$6$	$8$	$10$	$12$	$6$	$5$	$3$

Class interval	$0 - 20$	$20 - 40$	$40 - 60$	$60 - 80$	$80 - 100$	$100 - 120$	$120 - 140$
Frequency	$6$	$8$	$10$	$12$	$6$	$5$	$3$

Class-interval	20−40	40−60	60−80	80−100	100−120	120−140	140−160
Frequency	3	7	11	15	13	6	2

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