Edexcel IGCSE Math B 7.B 2D mensuration Question Bank

Practise finding areas of 2D shapes from diagrams, including trapezia, circles, sectors, polygons and algebraic side lengths.

Exam points

form equations from areas or perimeters of compound polygons before solving for x
calculate shaded or missing areas by combining circles, trapezia, triangles or rectangles
use Pythagoras or trigonometry to find a height or radius needed for an area formula

[Maximum number: 3]

Diagram NOT accurately drawn

Figure 3 shows a circle with centre O and radius 10 cm.
The points A and B lie on the circle such that $\angle A O B=100^{\circ}$ The point C is such that AC and BC are tangents to the circle.

Calculate the area, in $\mathrm{cm}^{2}$ to 3 significant figures, of OACB.

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7.B 2D mensuration question 1