Question

Three angles of a quadrilateral measure56,115 and 84. Find the measure of fourth angle​

Answer 1

<A=56° , <B=115° , <C=84° , <D=?

As sum of all angles of a quadrilateral is 360,

then,

<A + <B + <C + <D = 360°

56° + 115° +84° + <D =360°

255° + <D = 360°

<D =360° - 255°

<D = 105°

Answer 2

Answer:

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