The diagram shows a circle with radius 3 and centre at O.
The circumference and the area of this circle are rational or irrational? [2 MARKS]

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Solution

Formula: 1 Mark
Answer: 1 Mark

The circumference is given by the formula $C = 2 \times π \times r$

So, $C = 2 \times π \times 3 = 6 π$

The area is given by the formula $A = π \times r^{2}$

So, $A = π \times 3^{2} = 9 \times π$

As, $π$ is irrational, so the circumference and area are both irrational.

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The diagram shows a circle with radius 3 and centre at O. The circumference and the area of this circle are rational or irrational? [2 MARKS]

Formula: 1 Mark Answer: 1 Mark The circumference is given by the formula C=2×π×r So, C=2×π×3=6π The area is given by the formula A=π×r2 So, A=π×32=9×π As, π is irrational, so the circumference and area are both irrational.

The diagram shows a circle with radius 3 and centre at O.
The circumference and the area of this circle are rational or irrational? [2 MARKS]