The diameter of the coaster is 5 cm.
Step-by-step explanation:
Given,
The area of the circle = 19.63 sq inch
To find the diameter, we need to find the radius
Formula
The area of a circle with radius(r) = π
sq cm
According to the problem,
π
= 19.63
or,
= 
= 6.2459
or, r =
= 2.499 (approx)
= 2.5 cm
Hence the diameter of the circle = 2 × 2.5 cm = 5 cm
The answer would be 0.0049088359
The equation for a circle is as followed:

where the center of the circle is at (h,k) and the radius of the circle is r.
We are given (h,k) and need to find the radius. To do so, we can use the distance formula to find the distance from the center to the point on the circle:

Plug in the two points:



If the distance from the center to the edge of the circle is the square root of 117, then r^2 = 117.
The answer is:
Answer:

Step-by-step explanation:
Area of parallelogram =base x height
Area=20 x 8=160
Units=

Answer:
B. (11, -2)
Step-by-step explanation:
x.) 4 + 7 = 11
y.) -10 + 8 = -2