Question

What is the approximate area of the composite figure shown? Use 3.14 for pi .

Answer 1

help

Answer 2

do you know the formula for area of rectangle ?

Answer 3

yes

Answer 4

so what the area of that rectangle ?
also, did you realize that area of composite figure = area of rectangle +area of semicircle
?

Answer 5

im stuck

Answer 6

the two sides given are 8 and 20, so the area of rectangle = 8*20 =.. ?

Answer 7

160

Answer 8

now to get area of semicircle, we need the radius (or diameter)
can you figure out that ?

Answer 9

that was the hard part for me

Answer 10

you know what a diameter is ?

Answer 11

like a stight line that gose thrue a circel

Answer 12

yes, almost. so, the diameter here is 8, right ?
now use the formula for area of circle =\(\pi d^2/4\)
using, d=8
what area u get ?

Answer 13

172.56

Answer 14

how, ? i get 64pi/4 = 50.2654

Answer 15

composite area = 160+50.2654 =... ?

Answer 16

ohh ok

Answer 17

210.2654

Answer 18

yes, thats approximate area of your composite figure.

Answer 19

ok