if three angles of a quadrilateral are each equal to 75 degree then find the fourth angle?
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Answer:
The sum of all four angles of the quadrilateral is 360°. To find the fourth angle or the missing angle in a quadrilateral when the measurements of three angles of a quadrilateral are known, then subtract the three angles from 360° to calculate the missing angle.
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We are given that three angles of a quadrilateral are each equal to 75°
Sum of all angles of quadrilateral is 360°
So, 75°+75°+75°+x=360°
225°+x=360°
x=360°-225°
x=135°
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