General form for circle is
(x - a)^2 + (y - b)^2 = r^2

so if center is at (3,-2) we can plug in a and b:-

(x-3)^2 + (y+2)^2 = r^2

Now plug in x = 7 and y =1 (from the point R)

4^2 + 3^2 = r^2
r^2 = 25 making r = 5

so its diameter = 2*5 = 10

6 0

3 years ago

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If BD = 16 yd and the area of rhombus ABCD is 72 yd^2, what is AC?

anygoal [31]

Formula for finding area of rhombus: $\frac{d1 * d2}{2}$

d₁ = 16 yd

Area = 72 yd²

Rhombus Area =>

$\frac{16 * d2}{2} = 72$

16*d₂ = 144

d₂ = 9

AC = 9 yd

Hope it helps!

6 0

2 years ago

What is the answer to this? Multiply 1/4 x -2=

CaHeK987 [17]

Answer:

-0.5

Step-by-step explanation:

8 0

3 years ago

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