## la 2 years ago Can u help me with the Extra Credit i tried but still cant get it -___- http://instagram.com/p/TBa3HrmH9y/

1. chaguanas

It has something to do with common sides and common angles.

2. malevolence19

You have enough info to solve for all the quantities for a single triangle. Find its area. Multiply by 4. Done.

3. la

thats the problem i dont know how to work it out lol

4. malevolence19

Okay do you know trig?

5. la

yes

6. cherio12

You can just do the area of a circle divided by 6, times two

7. la

i dont know the area though

8. cherio12

but you know radius, so you can find area

9. malevolence19

You can find the ratio of the shaded to unshaded. So we have: 240 degrees of the thing is UNSHADED right? So this means that 120 degrees IS shaded. This means that 120/360=1/3. So the shaded region is 1/3 of the total region. So we need the area of the total region. We have a radius of 2 cm. This gives: 4 pi cm^2 for the TOTAL area, Multiply by 1/3 to get the area of the shaded region. so: 4/3 pi cm^2. :)

10. malevolence19

240=180+60;

11. la

so the answer is 4/3 pi cm^2 ?

12. malevolence19

My first response I was looking at the problem above it. I mean, it says nearest hundreth so you might wanna calculator it a bit but that's the **Exact** answer.

13. cherio12

Area of circle= pi(2^2)=4pi/6*2=4/3 pi

14. la

so type 4/3 pi cm^2 in the calculator and get the nearest hundredth?