Circle and Sphere Geometry

Froggy Jumps

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Circles and spheres basics

Créé par

Aisamal Sazanbaeva

Kazakhstan

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Circle and Sphere Geometry


Froggy Jumps Circle and Sphere GeometryVersion en ligne Circles and spheres basics par Aisamal Sazanbaeva 1 What 3D shape is formed by rotating a circle around its diameter? a Cone b Cylinder c Sphere 2 What is the 2D boundary of a circle called? a Diameter b Circumference c Radius 3 The distance from the center to any point on a circle is what? a Circumference b Diameter c Radius 4 What is the formula for the surface area of a sphere? a S = πr² b S = 2πr c S = 4πr² 5 What is the area of a circle with radius r? a 2πr b πr^2 c πr^3 6 True or False: a circle is 2D and a sphere is its 3D analogue. a Both are 2D b True c False 7 If the radius doubles, how does the circle's area change? a Doubles b Becomes eight times c Becomes four times 8 What is the formula for the area of a circle with radius r? a A = πd^2 b A = 2πr c A = πr^2 9 If radius r = 7, what is the circumference? a 7π b 14π c 28π 10 Diameter is 10. What is the circle area? a 50π b 25π c 100π 11 Radius 4 gives what area? a 16π b 32π c 8π 12 What is the relation between diameter and radius? a r = 2d b d = 2r c d = r/2 13 If circumference is 31.4, what is the radius (approx)? a 5 b 10 c 2.5 14 Which formula gives area in terms of diameter? a A = πd^2 b A = π(d/2)^2 c A = 2πr 15 If radius is halved, how does area change? a Area doubles b Area remains same c Area becomes one-quarter 16 Which statement is true? a Increasing radius increases both area and circumference b Circumference stays same if radius increases c Area decreases when radius increases

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Circle and Sphere Geometry

Froggy Jumps

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Circle and Sphere GeometryVersion en ligne

par Aisamal Sazanbaeva

What 3D shape is formed by rotating a circle around its diameter?

What is the 2D boundary of a circle called?

The distance from the center to any point on a circle is what?

What is the formula for the surface area of a sphere?

What is the area of a circle with radius r?

True or False: a circle is 2D and a sphere is its 3D analogue.

If the radius doubles, how does the circle's area change?

What is the formula for the area of a circle with radius r?

If radius r = 7, what is the circumference?

Diameter is 10. What is the circle area?

Radius 4 gives what area?

What is the relation between diameter and radius?

If circumference is 31.4, what is the radius (approx)?

Which formula gives area in terms of diameter?

If radius is halved, how does area change?

Which statement is true?