GB-25-06-001 · Algebraic perimeter and area
A rectangle has width x cm and length (x + 8) cm. Its perimeter is 88 cm. Work out its area.
Algebraic Perimeter & Area of a Rectangle
Booklet p. 10
Method
1) Form perimeter equation 2(x) + 2(x + d) = P
2) Kill, kill to solve for x
3) Multiply width × length for area
Worked Example (GB-25-06-001)
Booklet p. 10 — Form linear equation, collect like terms, and "Kill, kill" to solve for :
1) 4x + 16 = 88.
2) x = 18.
3) 468 cm²
468 cm²