Mr. Ortiz used similar triangles to make a design. Which statement about the triangles in the design is must be true? A. They are the same size and shape

B. They are the same size but different shapes

C. They have corresponding angles that are congruent

D. They have corresponding sides that are congruent

Please help I need to pass by Monday.

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.