The figure is made up of 3 similar overlapping squares of side 6 cm. The squares touched one another at Corners N,P,Q,R and S. Asher shaded the parts where the squares overlapped each other.
- Find the area of the unshaded part of the figure.
- What fraction of the figure is the shaded part?
(a)
Area of 3 squares
= 3 x (6 x 6)
= 108 cm
2Area of 4 triangles (due to 2 overlapping triangles)
= 4 x (
12 x 6 x 3)
= 36 cm
2 Area of the unshaded part of the figure
= 108 - 36
= 72 cm
2
(b)
Area of the shaded part
=
12 x (6 x 6)
= 18 cm
2 Total area
= 72 + 18
= 90 cm
2
Fraction of the shaded part to the figure
=
1890 =
15 Answer(s): (a) 72 cm
2; (b)
15