Question

Three angles of a quadrilateral are 86°, 88° and 89°. Find the fourth angle

Answer 1

Answer:

By angle sum property of a quadrilateral,

sum of all the interior angles=360

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Let x be the fourth angle.

∴48

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+85

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+140

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+x=360

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∴x=360

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−273‬

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=87

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Answer 2

as sum of all angles in a Quadrilateral is 360°

$\sf let \: \: the \: \: \: fourth \: \: \: angle \: \: \: be \: \: \boxed{ \sf y}$

so ,

$\sf86 °+ 88 °+ 89° + y = 360°$

$\sf y = 360 \degree - 263° = 97°$

• The Fourth angle is 97°