Given: ABCD is a parallelogram.
Prove: ZA and 2D are supplementary
By the definition of a parallelogram, AB // DC. AD is a
transversal between these sides, so ZA and 2D are
angles. Because AB and DC are
the same-side interior angles must be
by the same-side interior angles
theorem. Therefore, LA and 2D are supplementary

c is the correct answer

step-by-step explanation:

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.