Three-fourths of a cross and a circle complete, two semi-circles with a perpendicular meet. Then add a triangle that stands on 2 feet, Two semi-circles and a circle complete. What am I?
Square ABCD has a side length of 4. Construct a quarter circle with radius 4 centered at B and a semi-circle with diameter AD. What is the area of overlap between the quarter circle and semicircle?
Three non-concentric circles of equal radii are drawn such that each circle touches the other two externally. The centres are joined to form a triangle whose area is 17320.5 cm^2. Find the area of the triangle not included in the circles.
In a square with a side length of 1, two quarter circles are drawn and a circle is inscribed between the quarter circles, as shown in the diagram. What is the radius of the inscribed circle?
You are given a circle with diameter AB and a point C. You are to construct a perpendicular CD to the diameter AB using only a straight edge (a ruler without markings).
Two circles with the same radius overlap each other. Their circumferences cross each other's center. How much of the area of either circle in percentage is the overlapped area?
