A square with side length 1 is divided into 4 congruent right triangles, as shown, and a square in the center. Inscribe a circle in each triangle and in the center square. If all 5 circles are congruent, what is the radius of each circle?
A circle with radius 1 is divided into 12 congruent regions, as shown below. What is the perimeter of a single region?
A unit circle is divided into 12 congruent regions, as shown. What is the perimeter of one of these regions?
A right trapezoid is partitioned into 4 triangles by its diagonals, as shown:
Which colored region has a largest area?
Two circles are drawn inside a square with side length 2 + SQRT(2) as shown in the figure. Let the radius of the larger circle be R and the radius of the smaller circle be r . Find the value of R + r
A circle circumscribed 5 squares with side length 1, as shown below. (The squares are in a 2×2 grid and one circle on the right middle). What is the radius of the circle?
