7.G.B.4 Math Practice Questions — Sports Academy Games

Practice playeasy

A circle has a radius of $15$ feet. What is the area, in square feet, of the circle?

The area of a circle is $A = \pi r^{2}$ . Substitute $r = 15$ : $A = \pi(15)^{2} = 225\pi\textsf{.}$

Practice playeasy

A circle has radius $3$ . Using $\pi = 3$ , what is its area?

$A = \pi r^2 = 3 \times 9 = 27$ .

Practice playeasy

A circle has a radius of $7$ meters. What is the area, in square meters, of the circle?

The area of a circle is $A = \pi r^{2}$ . Substitute $r = 7$ : $A = \pi(7)^{2} = 49\pi\textsf{.}$

Practice playeasy

A circle has diameter $8$ . Using $\pi = 3$ , what is its circumference?

$C = \pi d = 3 \times 8 = 24$ .

Practice playeasy

A circle has a diameter of $16$ inches. What is the area, in square inches, of the circle?

The radius is half the diameter: $r = \dfrac{16}{2} = 8$ . The area is $A = \pi r^{2} = \pi(8)^{2} = 64\pi\textsf{.}$

Practice playeasy

A circle has radius $1$ . Using $\pi = 3$ , what is its area?

$A = \pi r^2 = 3 \times 1 = 3$ .

Practice playeasy

A circle has a radius of $9$ yards. What is the area, in square yards, of the circle?

The area of a circle is $A = \pi r^{2}$ . Substitute $r = 9$ : $A = \pi(9)^{2} = 81\pi\textsf{.}$

Practice playeasy

A circle has diameter $6$ . Using $\pi = 3$ , what is its circumference?

$C = \pi d = 3 \times 6 = 18$ .

7.G.B.4 math practice. Learn by doing.