Two concentric circles and two tangents. What is the yellow fraction?

# Tag: fraction

## The piercing

An equilateral triangle containing a right triangle and a line segment. What fraction is pink?

## Boxed in

A square with an inscribed right triangle. What fraction is yellow?

## An equitable portion

A square, its diagonals and a right triangle. What fraction is green?

## Eternal snow

A triangle with two angle bisectors. What fraction of its area is green?

## The movie film

Four squares and two shared vertices. What fraction is blue?

## An irregular tiling

A triangle divided by three line segments. What fraction is blue?

## The England win

A unit square containing two red overlapping congruent rectangles. If they cover exactly half the square’s area, what is their width x?

## The sneak peek

A rectangle with given side lengths is folded back and forth such that the corner touches the opposite side as shown. What is the minimal shaded fraction?

## Spiegel im Spiegel

A triangle with an inscribed triangle. What fraction of the former does the latter cover in terms of lengths a, b, c, d, e and f?