Level 3 The figure, not drawn to scale, is made up of 2 squares. The length of each square is a whole number. The shaded area is 40 cm
2. Find the perimeter of the bigger square.
Length of Small Square |
Area of Small Square |
Area of Big Square |
Length of Big Square |
Is the length of big square a whole number? |
2 |
2 x 2 = 4 |
4 + 40 = 44 |
√44 ≈ 6.63 |
No (x) |
6 |
6 x 6 = 36 |
36 + 40 = 76 |
√76 ≈ 8.72 |
No (x) |
9 |
9 x 9 = 81 |
81 + 40 = 121 |
√121 = 11 |
Yes (✓) |
Length of the smaller square = 9 cm
Area of the smaller square = 81 cm
2
Area of the bigger square
= 81 + 40
= 121 cm
2 Length of the bigger square
= √121
= 11 cm (It is a whole number.)
Perimeter of the bigger square
= 4 x 11
= 44 cm
Answer(s): 44 cm