Short Quiz

Question 1 of 5

NCERT Exemplar

The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm is

A 56 cm B 42 cm C 28 cm D 16 cm

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Question 2 of 5

NCERT Exemplar

If \(\theta\) is the angle (in degrees) of a sector of a circle of radius \(r\), then area of the sector is

A \(\frac{\pi r^2 \theta}{360}\) B \(\frac{\pi r^2 \theta}{180}\) C \(\frac{2 \pi r \theta}{360}\) D \(\frac{2 \pi r \theta}{180}\)

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Question 3 of 5

NCERT Exemplar

If the circumference of a circle and the perimeter of a square are equal, then

A Area of the circle \(=\) Area of the square B Area of the circle \(>\) Area of the square C Area of the circle < Area of the square D Nothing definite can be said about the relation between the areas of the circle and square.

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Question 4 of 5

NCERT Exemplar

If the sum of the circumferences of two circles with radii \(R_1\) and \(R_2\) is equal to the circumference of a circle of radius \(R\), then

A \(\mathrm{R}_1+\mathrm{R}_2=\mathrm{R}\) B \(R_1+R_2>R\) C \(R_1+R_2<R\) D Nothing definite can be said about the relation among \(R_1, R_2\) and \(R\).

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Question 5 of 5

NCERT Exemplar

The area of the circle that can be inscribed in a square of side 6 cm is

A \(36 \pi \mathrm{~cm}^2\) B \(18 \pi \mathrm{~cm}^2\) C \(12 \pi \mathrm{~cm}^2\) D \(9 \pi \mathrm{~cm}^2\)

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