In parallelogram ABCD, m∠A = 63. Find m∠B.

Question

i dont know how to find m∠B.

Answer 1

Hi Estefany J

A parallelogram like a rectangle is a quadrilateral the sum of the interior angles is 360. Like a rectangle the angles in opposite corners of your parallelogram are equal and angles along the same side (adjacent angles) are supplemental.

If you draw your parallelogram correctly you should have two corners with angles that measure 63 degrees each and two corners that measure (180 - 63)

That said

2(m∠A) + 2(m∠B) = 360

2(m∠B) = 360 - 2(m∠A)

(m∠B) = (360 -2(m∠A))/2

Can you use the information above to calculate a value for m∠B?

I hope this helps if you need more information please write back.