Five identical square tiles were pasted onto a rectangular wall shown .
- What is the area of the rectangular wall?
- What is the perimeter of the shaded part?
(a)
Length of each square tile
= 52 - 44
= 8
Length of the rectangle
= 21 + (4 x 8)
= 21 + 32
= 53
Area of the rectangular wall
= 53 x 52
= 2756 cm
2 (b)
Perimeter of the shaded part
= 52 + 52 + (53 - 8) + (53 - 8)
= 52 + 52 + 45 + 45
= 194 cm
Answer(s): (a) 2756 cm
2; (b) 194 cm