Is a quadrilateral a parallelogram if only two sides are congruent and the other two values are unknown? If so, what theorem would this follow?

Is a quadrilateral a parallelogram if only two sides are congruent and the other two values are unknown? If so, what theorem would this follow?

i don't understand how to find the measure of <C.

A square is a kite: True or False?

What is the measure of M<QRS?

y=6,y=6x+5;y=6x-7;y=-8

Two column proof for this. I am totally lost...

In parallelogram ABCD, AC and BD intersect at E. If AE is 5x-6 and EC is 2x+3, find the of x. What is the length of AC? If BD is 6x, what kind of quadrilateral could his be? Why?

In parallelogram ABCD, AB=4x-3 and CD=2x+5. Find the length of AB. If AD=5z-7, what kind of quadrilateral could ABCD be? Why?

Geometry homework question, need help in order to find the measure Of angle 2 the answer needs to be numeric.

y2-1+4y+4=90 and I simplified it to y2+4y=87 what does y equal?

GRAM is a parallelogram. RM intersects GA at point S. The perimeter of triangle GRS is 21. The perimeter of triangle RAS is 26. The perimeter of triangle GRA is 35. What is the length of segment RM...

I'm guessing the shape is a square because a square has all equal sides, yet I am not sure, please help??

I need help

Using a two-column proof, prove that the opposite sides of a parallelogram are congruent, given that the shape is a parallelogram.

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