Question

Three angles of a quadrilateral are 75°, 90°and 75°, the fourth angle

is_____
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Answer 1

Answer:

ans). Sun of all angle= 360°

75°+90°+75°+D°=360°

D°=360°-75°-90°-75°

D°=120°

The fourth angle are 120°

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Answer 2

$\huge\bold{\underline {\underline\orange{Answer-}}}$

Given:-

• Three angles of quadrilateral
• 75°,90°,75°

$\huge \mathbb \red{Find- }$

• Fourth angle of a quadrilateral

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• We know that sum of all four angles of a quadrilateral is 360°
• In this question ,three angles are given ,let the fourth angle of x

$\small \rm {\underline \red{Let's ~solve~further - }}$

• 75°+90°+75°+x=360°
• 240°+x=360°
• x=360°-240°
• x=120°

$\huge\bf\green{x=120°}$

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Verification:-

We all know that sum of all angles of a quadrilateral is 360°

So ,let's insert value of x and check our answer

75°+90°+75°+120°=360°

360°=360°

Our answer is correct...

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