Question
the figure below shows 3 similar circles that just touch one another.A,Band C are the centres of the circles.If the perimeter of the triangle ABC is 42cm, what is the total area of the unshaded part of the 3 circles. (take pie = 22/7)
Answers
Steve
what are "similar" circles? If you mean they have the same radius, then
ABC is equilateral, with side 14, circles have radius 7.
Area of ABC is 49/2 √3
Area of circular sectors included in ABC is
3 * 1/2 (40)(π/3) = 20π
Dunno what's shaded or not, but that should give you the numbers to work with.
ABC is equilateral, with side 14, circles have radius 7.
Area of ABC is 49/2 √3
Area of circular sectors included in ABC is
3 * 1/2 (40)(π/3) = 20π
Dunno what's shaded or not, but that should give you the numbers to work with.