Question

if three angle of a quadrilateral are 20 degree 90 degree and 90 degree find the fourth angle of the quadrilateral
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Answer 1

forth angle of the quadrilateral is 160

20+90+90+x=360

200+x=360

x=160°

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Answer 2

Step-by-step explanation:

90°+90°+20°+X=360

as sum of internal angle is 360

; X=160°