Question

Geometry help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

The figure below shows a circular prop with two triangles labeled ABC and AOC made on it. The center of the prop is labeled O.
https://www.connexus.com/content/media/532465-1182011-110442-AM-321962674.jpg
What is the area of the cloth required tomake the circular prop?

Answer 2

I can't figure it out and I have to get a good grade to pass the class, anyone good at geometry?

Answer 3

do you know the answer? is it 39.25?

Answer 4

Heres the choices;
# 17.83 ft2
# 23.60 ft2
# 29.63 ft2
# 39.27 ft2

Answer 5

39.27

Answer 6

ok so the angle at the centre must be double the angle at the top so: angle ABC is 45 so angle AOC must be 90, hence the triangle AOC is right angled and as yu can tell the hypotenuse is 5

Now the radius of the circle is OA and OC which means the lengths OA and OC are the same....

Therefore
if yu let OA=x=OC
then x^2 + x^2 = 5^2
2x^2 = 25

solve for x, to get the radius then use the area of a circle equation to get the area of the circular cloth

Answer 7

answer is 39.27 ft2

Answer 8

Thanks!!!!!! could you help me with one more?

Answer 9

sure ill try

Answer 10

An aquarium sells cubic fish tanks of different sizes. The length of the small size fish tank is 4 feet. The dimensions of the jumbo size fish tank are double the dimensions of the small size fish tank. Which expression can be used to find the ratio of the volume of the small size fish tank to the volume of the jumbo size fish tank?

Answer 11

post a separate question

Answer 12

https://www.connexus.com/content/media/532465-1182011-113631-AM-2108352531.jpg

Answer 13

volume = x^3
now if yu double the length
volume = (2x)^3 = 8x^3

so V of small tank is 64
and V of big tank must be 512

ratio = 1:8

Answer 14

these are the choices https://www.connexus.com/content/media/532465-1182011-113631-AM-2108352531.jpg
is it d?

Answer 15

dat link just says 4/8 ^

Answer 16

the answer is 1/8 , well dats the answer that i got

Answer 17

4/8^2
8/4^2
4/8^3
8/4^3

Answer 18

yep so its d, 8/4^3

Answer 19

ok

Answer 20

one more? lol im horrible at this

Answer 21

haha dats fine, sure ill try to help

Answer 22

Alex designed the model of a cylindrical water tank to be installed in a park. The model has a radius of 5 cm and a height of 14 cm. The dimensions of the actual water tanks that will be installed in the park are 8 times larger than the model. The total surface area of the actual water tanks, rounded to the nearest whole number, is _________ cm². Use 22/7 for pi.

Answer 23

so SA of model is 2*pi*r*h + pi*r*r
SA of actual model is pi*8r*8r + 2*pi*8r*8h = 64 (2*pi*r*h + pi*r*r) = 64*(SA of model)

hence SA of model is 778.5
and SA of actual model is 778.5*64 = 49826.5 cm2