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Q.

What is the complement angle of 20°?


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a

50°

b

45°

c

60°

d

70° 

answer is D.

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Detailed Solution

It is given 20°.
A pair of angles are called complementary if their sum is equal to 90°.
Let the unknown angle be ‘x’. Then,
⇒20+x=90 ⇒x=70° Hence option (4) is correct.
 
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What is the complement angle of 20°?