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Question

If the sum of three angles of a quadrilateral is 300°. Find the measure of fourth angle.

A
30°
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B
45°
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C
60°
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D
90°
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Solution

The correct option is C 60°
We know that by angle sum property, the sum of internal angles of a quadrilateral =360

Let the unknown angle be x.

So, 300+x=360x=360300x=60

The fourth angle is 60.

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