Circles

A circle has a radius of $10\text{cm}$. Its diameter is ...

A circle has a diameter of $14\text{cm}$. With $\pi =\frac{22}{7}$, its circumference is ...

A circle has a radius of $7\text{cm}$. With $\pi =\frac{22}{7}$, its area is ...

A circle has a diameter of $20\text{cm}$. With $\pi =3.14$, its circumference is ...

A bicycle wheel has a diameter of $35\text{cm}$. If it turns 10 times, the distance travelled is ... ($\pi =\frac{22}{7}$)

A circle has a radius of $14\text{cm}$. Its diameter is ...

A circle has a diameter of $10\text{cm}$. With $\pi =3.14$, its circumference is ...

A circle has a radius of $10\text{cm}$. With $\pi =3.14$, its area is ...

A circle has a diameter of $30\text{cm}$. Its radius is ...

A circle has a radius of $21\text{cm}$. With $\pi =\frac{22}{7}$, its circumference is ...

A circle has a diameter of $28\text{cm}$. With $\pi =\frac{22}{7}$, its area is ...

A circle has a circumference of $88\text{cm}$ with $\pi =\frac{22}{7}$. Its radius is ...

A circle has an area of $154{\text{cm}}^2$ with $\pi =\frac{22}{7}$. Its radius is ...

A semicircle has a diameter of $14\text{cm}$. With $\pi =\frac{22}{7}$, its perimeter (including the straight edge) is ...

A circular garden has a diameter of $20\text{m}$. With $\pi =3.14$, its area is ...

A wheel has a diameter of $70\text{cm}$. How many metres does it travel after 100 turns? ($\pi =\frac{22}{7}$)

A circle has an area of $616{\text{cm}}^2$ with $\pi =\frac{22}{7}$. Its diameter is ...

A circular pond has a radius of $3.5\text{m}$. With $\pi =\frac{22}{7}$, its area is ...

A circle has radius $r$. If the radius is enlarged to $2r$, the area becomes ... times the original area.

A circle has a circumference of $62.8\text{cm}$ with $\pi =3.14$. Its area is ...