kyracoast5 kyracoast5
  • 02-05-2018
  • Mathematics
contestada

can i have some help on these two problems

can i have some help on these two problems class=

Respuesta :

upandover
upandover upandover
  • 02-05-2018
Hi there!

In order to find the shaded area, we'll need to find the area of the larger circle and subtract the area of the smaller circle from it.

WORK:
A = pi x 36 (larger)
A = 36pi
A = pi x 16 (smaller)
A = 16pi
36pi - 16pi = 20pi or 62.8cm^2

When a radius is doubled, the entire area is quadrupled. This is because the radius is squared.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
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