Question 33
Figure I shows a square of area $40\,\mathrm{cm}^2$, cut into five isosceles right triangles, a square, and a parallelogram, forming the seven pieces of the Tangran game. These pieces can form Figure II, which has a shaded hole. What is the area of the hole?
Figure I
Figure II
A) $5\,\mathrm{cm}^2$; B) $10\,\mathrm{cm}^2$; C) $15\,\mathrm{cm}^2$; D) $20\,\mathrm{cm}^2$; E) $25\,\mathrm{cm}^2$.
Figure I
Figure II
A) $5\,\mathrm{cm}^2$; B) $10\,\mathrm{cm}^2$; C) $15\,\mathrm{cm}^2$; D) $20\,\mathrm{cm}^2$; E) $25\,\mathrm{cm}^2$.