Wednesday

September 3, 2014

September 3, 2014

Posted by **jim** on Thursday, December 8, 2011 at 5:12pm.

Circle A=radius 8cm

Circle B=radius 4cm

Circle c=radius 1cm

A triangle is formed by connecting the centers of the 3 traingles. Determine the largest angle for the traingle and which circle is the largest angle?

Also what is the area?

Please help really stumped!=[

- pre calc -
**Reiny**, Thursday, December 8, 2011 at 5:48pmWouldn't the triangle have sides of 12, 9, and 5 ?

So you given 3 sides,

Use the cosine law I just showed you in your previous post.

For the area use Heron's law

A = √(s(s-a)s-b)(s-c), were a,b, c are the sides and

s = (1/2)perimeter.

s = (12+9+5)/2 = 13

s-a = 13-12 = 1

s-b = 13-8 = 5

s-c = 13-5 = 8

area = √(13x1x5x8) = √520 = appr. 22.8 cm^2

**Answer this Question**

**Related Questions**

pre calc - each of three circles touches the other 2.circle A has a radius of 8 ...

Pre-Calc - Describe the conditions necessary for the two circles, where circle a...

Pre-Calc (Circles) - Describe the conditions necessary, where circle A has a ...

maths - there are two circles touching each other at one point. The radius of ...

GEOMETRY CIRCLES PLEASE - 1.An isosceles triangle with each leg measuring 13 cm ...

GEOMETRY CIRCLE - 1.An isosceles triangle with each leg measuring 13 cm is ...

GEOMETRY CIRCLES PLEASE - HELP ME PLEASE. 1.An isosceles triangle with each leg...

Math - Circle C has radius 4 inches. Circle D had radius 9 inches. These two ...

math gre question - in an infinite series of circles the radius of the second ...

Geometry - A dartboard consists of five concentric circles. The radius of the ...