A square contains two triangles. What fraction of the square do they cover?
Tag: area
The warning triangle
An equilateral triangle contains three congruent rectangles. Two distances on its base are given. What fraction is white?
The baby brother
Three small right triangles embedded in a large right triangle. Two of the areas are given. What’s the area of the smallest one?
The tumbler doll
A circle within an equilateral triangle within a circle. What fraction is shaded?
The folded triangle
An equilateral triangle is folded with its left side at right angles with the base. What fraction of the total triangle is shaded?
The circus tent
A regular octagon is coloured as shown. What fraction of its area is red?
The windshield wipers
A square and two rectangles, connected by two circular arcs, form a square. What is the proportion of the orange to the green area?
Velocipede II
Two circles of area π and 9π respectively are contained in a parallelogram. What’s its area?
The square peg
A square is fitted into an equilateral triangle as shown. What fraction is shaded?
The velocipede
Two circles are embedded in a frame of size 9 x 8. What is their total area?