Question

16) The diameter of a circle is 3/4ft. Find the radius.

17)The radius of a circle is √13 cm. Find the diameter. Leave your answer in simplest radical form

41) Given the equation (x+5)^2+y^2 =75 identify the circle's center and the length of its radius. Leave your answer in simplest radical form.

42) Given the center of a circle lies at (6,-3) and the diameter has a length of 14, write the equation of the cirlce

Answer 1

16) diameter = 2×radius

3/4 ft = 2×r

r = 3/8

17) 2×radius = diameter

2×√13 = 2√13 cm

42) center = (6,-3)

radius = 14/2

= 7

[x-(6)]²+[y-(-3)]² = 7²

(x-6)²+(y+3)² = 49