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Three of the angles of a quadrilateral are 90 , 156 and 28 . what is the size of the 4th angle?
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Jul 1, 2017
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Three of the angles of a quadrilateral are 90 , 156 and 28 . what is the size of the 4th angle?
Mathematics
high-school
Romanos
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Romanos
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The sum of angles in a quadrilateral = 360 degrees.
Let the fourth angle be x:
Therefore: 90 + 156 + 28 + x = 360
274 + x = 360
x = 360 - 274
x = 86
x = 86°
I hope this helps.
Derek Wright
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Jul 4, 2017
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Derek Wright
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The sum of the sides of a quadrilateral is equal to 360º.
x= 4th angle measurement
We have the following equation:
90+156+28+x=360
x=360-90-156-28
x=86
Answer: the size of the 4th angle would be 86º.
Aswath
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Jul 6, 2017
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Aswath
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