iGCSE Mathematics (0580) : C5.2 Carry out calculations involving the perimeter and area iGCSE Style Questions Paper 1

Question

This shape is drawn on a 1 cm² grid.
Find the perimeter of the shape.

▶️ Answer/Explanation

Solution

24 cm

1. Count the number of 1 cm sides around the shape.

2. The perimeter is the total length of all sides.

3. The correct answer is 24 cm.

Question

Work out the area of this trapezium.

▶️ Answer/Explanation

Solution

Ans: 21,600 mm²

Area of trapezium = ½ × (sum of parallel sides) × height

= ½ × (204 + 72) × 180

= ½ × 276 × 180

= 138 × 180 = 24,840 mm²

(Note: There seems to be discrepancy between the answer and calculation)

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