A circle is divided into 8 equal parts. Given that the area of the shaded portion is (10/4) $m^{2}$ . Find

the area of the unshaded part of the circle.

[4 MARKS]

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Solution

Concept: 1 Mark
Figure: 0.5 Marks
Application: 2.5 Marks

Area of the shaded portion = (10/4) $m^{2}$

The circle is divided into 8 equal parts

Area of the circle = (8)*(10/4)

= 20 $m^{2}$

Area of unshaded part = Total area - shaded area

= 20 - $\frac{10}{4}$ $m^{2}$
= $\frac{80 - 10}{4} m^{2}$
= $\frac{70}{4}$ = 17.5 $m^{2}$

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A circle is divided into 8 equal parts. Given that the area of the shaded portion is (10/4) m2. Find the area of the unshaded part of the circle. [4 MARKS]

Concept: 1 Mark Figure: 0.5 Marks Application: 2.5 Marks Area of the shaded portion = (10/4) m2 The circle is divided into 8 equal parts Area of the circle = (8)*(10/4) = 20 m2 Area of unshaded part = Total area - shaded area = 20 - 104 m2 = 80−104m2 = 704 = 17.5 m2

A circle is divided into 8 equal parts. Given that the area of the shaded portion is (10/4) $m^{2}$ . Find

the area of the unshaded part of the circle.

[4 MARKS]