Circumference and area of a circle test, 7 grade

Question Nr. 1 out of 10

The radius is 7 cm. Calculate the circumference using π ≈ 3.14.

43.96 cm

43.06 cm

47.88 cm

41.32 cm

40.35 cm

Question Nr. 2 out of 10

The radius of a circle is 20 cm. Find its diameter.

9 cm

29 cm

37 cm

40 cm

45 cm

Question Nr. 3 out of 10

A quarter-circle has radius 14 cm. Calculate only the arc length using π ≈ 3.14.

21.64 cm

21.98 cm

26.08 cm

17.42 cm

23.11 cm

Question Nr. 4 out of 10

A wheel has radius 2 cm. How far does it travel in 4 complete revolutions? Use π ≈ 3.14.

56.58 cm

50.88 cm

59.43 cm

50.24 cm

44.21 cm

Question Nr. 5 out of 10

If a circle’s radius is multiplied by 3, by what factor does its area increase?

3 times greater

9 times greater

6 times greater

It does not change

Question Nr. 6 out of 10

The radius of a circle is 4 cm. Calculate its area using π ≈ 3.14.

58.39 cm²

59 cm²

42.02 cm²

47.27 cm²

50.24 cm²

Question Nr. 7 out of 10

A semicircle has radius 16 cm. Calculate the area of the semicircle using π ≈ 3.14.

393.59 cm²

399.79 cm²

401.26 cm²

403.12 cm²

401.92 cm²

Question Nr. 8 out of 10

A wheel has radius 6 cm. How far does it travel in 8 complete revolutions? Use π ≈ 3.14.

296.29 cm

302.35 cm

305.32 cm

310.17 cm

301.44 cm

Question Nr. 9 out of 10

The radius of a circle is 13 cm. Find its diameter.

34 cm

26 cm

7 cm

30 cm

28 cm

Question Nr. 10 out of 10

Which statement correctly explains the difference between circumference and the area of a circle?

They always mean exactly the same measurement

Circumference measures the boundary; area measures the interior

Circumference is measured in square units

A circle has no radius

Test: Circumference and area of a circle