Use a protractor but in general thr 4 interior angles of any quadrilateral add up to 360 degrees
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To find the measure of an angle, you need to know the size of the entire angle and the other angles within the angle. Then, you subtract the smaller, known angles from the entire, large angle and you should get the measure of the missing angle.
the side of an angle measurement
It is an isosceles triangle and the 3rd angle is 72 degrees.
abtues
An angle between 90 and 180 degrees.