Question

An equilateral triangle is inscribed in a circle of radius 18.8 cm. Find:
(a): the area of the triangle
(b): the area of the three segments surrounding the triangle

Answer 1

What did you think angle x be?

Answer 2

60

Answer 3

nope it is 120

Answer 4

Now what you need to do is finding the area of the triangle using r and x.
Can u do that?

Answer 5

I don't understand

Answer 6

Ok, can I look another question then?

Answer 7

ok

Answer 8

Maybe we could use trigonometry... :)

Answer 9

Thats my point

Answer 10

Because I got stuck at this:

Answer 11

\[\cos 30 = \frac{ 18.8 }{ x}\]

Answer 12

We already know an angle........

Answer 13

Can you draw it please?

Answer 14

OK

Answer 15

The unknown side = x

Answer 16

I used the cosine rule and I got x=33 cm