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Q.

Which of the following can be four interior angles of a quadrilateral?

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a

140°, 40°, 20°, 160°          

b

270°, 150°, 30°, 20°

c

40°, 70°, 90°, 60°             

d

70°, 70°, 80°, 80°             

answer is A.

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Detailed Solution

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As we know the sum of all interior angles in a quadrilateral is 360 °  .
So, by verifying each option, we get:
Option 1: 
140°+40°+20°+160°=360°  

Option 2:
270°+150°+30°+20°=470°  

Option 3:
40 ° + 70 ° + 90 ° + 60 ° = 260 °   

Option 4:
70°+70°+80°+80°=300°  

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