Three of the angles of a quadrilateral are 90 , 156 and 28 . what is the size of the 4th angle?

2 answers:

8 0

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.

Andrew [12]2 years ago

3 0

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.

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Read 2 more answers

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Answer:

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Step-by-step explanation:

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