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61°

Step-by-step explanation:

This is an isosceles triangle, because the two adjoining sides show 6 as their length. Since an isosceles triangle has two sides of same length, the other angle which is not labelled also has the same value of x.

That means:

x + x + 58 = 180°

2x + 58 = 180°

2x = 180° - 58

2x = 122°

x = 122/2

x = 61°

P.S. Hope you know that in a triangle, all angles add to 180°. Hope this helps!

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.

the second option

step-by-step explanation: