A quadrilateral has 2 pair of opposite angles. Then prove that it's a parallelogram
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The oposite angles are the same.
Sum of angles in quad is 360.
The first pair of oposite angles have a sum og 2A, given that they
are the same, A. What remains of the angular sum is now
360 - 2A = 2(180-A). So the other two oposite angles have
value of 180-A.
Given this, we can check that this is correct:
Angular sum = 2A + 2(180-A) = 2A + 360 - 2A = 360
Step-by-step explanation:
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