Level 1
Find the circumference of this circle. (Take π = 3.14)
1 m
Level 1
Find the circumference of this circle. (Take π = 3.14)
1 m
Level 1 PSLE
The shaded figure is a semicircle of diameter 40 cm. What is the perimeter of the shaded figure? Take π = 3.14
1 m
Level 1
Find the perimeter of this semicircle. (Take π = 227)
1 m
Level 1
Find the perimeter of this quadrant. Its radius is 4 cm. (Take π = 3.14)
1 m
Level 2
A chain is wrapped round two wheels which has a diameter of 8 m. Line AB is 12 m. Find the length of the chain. (Take π = 3.14)
2 m
Level 2
Find the perimeter of the shaded figure. (Take π = 227)
2 m
Level 2
The figure is made up of an equilateral triangle and a semi-circle of diameter 21 m. Find the perimeter of the figure. (Take π = 227)
2 m
Level 2
The figure is made up of 2 semicircles with diameters 8 cm and 16 cm respectively. What is the perimeter of the figure? (Take π = 227)
2 m
Level 2
The figure is made up of 2 quadrants with radii 16 cm and 8 cm respectively. Find the perimeter of the figure. (Take π = 3.14)
2 m
Level 2
Find the perimeter of the shaded figure. (Take π = 3.14)
2 m
Level 2
The figure is formed by 6 identical squares with 4 similar semi-circles cut out from it. Each square has a side of 14 cm. Find the perimeter of the shaded figure. Express the answer in terms of π.
2 m
Level 2
The figure is formed by 5 identical squares with 3 similar semi-circles cut out from it. Each square has a side of 14 cm. Find the perimeter of the shaded figure. Leave the answer in terms of π.
2 m
Level 2
The figure is made up of a semicircle and an equilateral triangle. The diameter is 42 cm. Find its perimeter.
2 m
Level 2
The diagram shows a semicircle with a diameter of 21 cm. Quadrant CDB has the centre A. The line AB divides the quadrant equally into 2 parts. Find the perimeter of the shaded region. (Take π = 227)
2 m
Level 2
The circumference of a circular walking path is 720 m. 9 stools are placed along the path at an equal distance. Find the distance between any 2 stools.
2 m
Level 2 PSLE
The shaded figure is formed by two identical circles with centres at A and C. ABCD is a square and the length of AB is 7 cm. Find the perimeter of the shaded figure. (Take π = 227)
2 m
Level 3
In the diagram shown, 23 identical rubber balls were placed between two walls with equally spaced gaps between them. The first rubber ball and the last rubber ball were touching the front wall and last wall respectively. Given that the distance between the two walls was 399 cm and that the radius of a rubber ball was 7 cm. Find the length of the gap between any two adjacent rubber balls as shown.
3 m
Level 3
Tom built a car using two identical wheels of radius 2.9 cm each as shown. The distance between the centres of the two wheels is 59.2 cm. He rolled the car from one end of the room to the other end touching walls at both ends. The distance between the two walls is 11.2 m. How many complete revolutions did each wheel make? Take π = 3.14.
3 m
Level 3
One part of a car wheel was stained with paint on its surface. The diagram showed the tyre marks made by the car wheel when the vehicle moved through a certain distance. Find the radius of the car wheel. Round off the answer to 2 decimal place. (Take π = 227)
3 m