- #1
kristo
- 13
- 0
Homework Statement
Find the blue colored surface area.
1 http://img338.imageshack.us/img338/1630/graph1zd7.png
The radii of the circles are 3 cm and 1 cm.
2 Find the surface area of the rosette inside the equilateral triangle with side a.
http://img87.imageshack.us/img87/2590/graph2dj9.png
Homework Equations
The Attempt at a Solution
I have no idea what to do with the first one.For the 2nd one the area of the rosette inside the triangle should be the area of 3 segments minus the area of the triangle.
Here's a picture of what I did, with one circle only:
http://img339.imageshack.us/img339/4650/circlerd9.png
This is what I got: [tex] \frac{a^2}{6}(2 \pi - \frac{3 \sqrt {3} }{2}) [/tex]
But the book says it's [tex] \frac{a^2}{6}(2 \pi - 3 \sqrt {3} ) [/tex], so can anyone check it?
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