Question

I’m gonna ask this question again can someone help me solve this and leave in terms of pi

Answer 1

The equation of the circumference of a circle in terms of $\pi$ is $2\pi r$ or $\pi d$.

The circumference for a circle with diameter 10 is $10\pi$.

The circumference for a circle with diameter 19 is $19\pi$.

The circumference for a circle with diameter 30 is $30\pi$.

The circumference for a circle with diameter 16 is $16\pi$.

Relatively easy, right?

The equation of the area of a circle in terms of $\pi$ is $\pi r^2$.

The area of a circle with radius 5 is $25\pi$.

The area of a circle with radius 9.5 is $90.25\pi$.

The area of a circle with radius 15 is $225\pi$.

The area of a circle with radius 8 is $64\pi$.

Hope this helped!

(By the way, I don't know why you're using hard formulas for trying to find the radius or diameter. The diameter is simply twice the radius, and the radius is simply half the diameter.)

Answer 2

Answer:

Circumference = 10$\pi$, 19$\pi$, 30$\pi$, 16$\pi$

Area = 25$\pi$, 90.25$\pi$, 225$\pi$, 64$\pi$

Step-by-step explanation:

For the first row we have the radius which is 5, the diameter is 10. The formula for circumference is 2$\pi$r. So for this one its gonna be 2$\pi$5 or 10$\pi$

radius = 5

diameter = 10

circumference = 2$\pi$5 or 10$\pi$

area = $\pi$$5^{2}$ or 25$\pi$

for the second row

radius = 9.5

diameter = 19

circumference = 2$\pi$9.5 or 19$\pi$

area = $\pi$$9.5^{2}$ or 90.25$\pi$

for the third row

radius = 15

diameter = 30

circumference = 2$\pi$15 or 30$\pi$

area = $\pi$$15^{2}$ or 225$\pi$

for the fourth row

radius = 8

diameter = 16

circumference = 2$\pi$8 or 16$\pi$

area = $\pi$$8^{2}$ or 64$\pi$