Two congruent circles and a right triangle inside a semicircle. What fraction is blue?

# Tag: area

## The hammock

A square inscribed in a triangle. Two areas are given. What is the square’s area?

## The cleaver

Four squares, a rectangle and a circle. What is the proportion brown : grey?

## The green field

A square is divided in two quadrilaterals of given area. What fraction of the square’s perimeter is red?

## Ice cube

A rectangle and a square. What is the proportion purple : blue?

## The hourglass

A rectangle with two crossing line segments. What’s the minimal shaded fraction?

Four quarter circles of radius 1, each containing a square. What is the blue area?

## Below the tree line

A triangle is split in two. What is the area of the green quadrilateral in terms of lengths a and b?

## The ramp

A right triangle is split in two. What is the maximum yellow fraction?

## The headphones

A unit square, a semicircle, a right triangle and an isosceles triangle. What is the total purple area?