CAIE IGCSE Mathematics Core C5.5.1 Carry Out Calculations and Solve Problems Involving Perimeters and Questions

Practise Core CAIE IGCSE Mathematics by splitting compound figures, adding boundary lengths and using area formulas.

Exam points

Calculate perimeter of compound or composite shapes by adding boundary lengths.
Calculate area of compound shapes by splitting them into familiar regions.
Use consistent units and solve for missing lengths or areas.

[Maximum number: 4]

NOT TO SCALE

The perimeter of this shape is equal to the perimeter of a square.
Find an expression for the length of one side of the square.
Give your answer in its simplest form.

6x+3 final answer
B3 for $\frac{24x+12}{4}$ seen or 6x+3 seen then spoilt
or B2 for 24x+12, $\frac{24x+k}{4}$ , or $\frac{kx+12}{4}$ seen, $k\ne0$
or M1/M2 for summing the perimeter terms correctly

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CAIE IGCSE Mathematics Core C5.5.1 Carry Out Calculations and Solve Problems Involving Perimeters and Questions question 1