Primary 6 · Circle · Question type 6.7
Decide first whether the question asks for perimeter or area, then use the printed length accordingly.
Try the question yourself, or watch the lesson first.
Primary 6, on the MOE Primary Mathematics syllabus.
The lesson · 2 minutes 17 seconds
Watch: half a circle on a square, and whether the question wants area or perimeter
Another worked example
A quadrant sign is painted on a wall. The curved edge of the quadrant measures 15.7 cm. Find the area of the quadrant face. (Take π = 3.14.)
The working · Five lines
Written out in full, the way it should appear on paper.
The answer is 78.5 cm².
Practise · Modelled on top school exam questions
Try it yourself first. Open the solution when you want to see the steps. No sign-up is needed. These questions are written by Mathweave, not copied from school papers.
Try it yourself
Read the question's target before selecting the circle method.
A square card has a side of 36 cm. A semicircle of diameter 18 cm is cut away from the middle of one side, leaving a curved notch. Find the perimeter of the remaining card. (Take π = 3.14.)
Ans: 154.26 cm
The practice plan adds more questions and saved progress.
Next, trace equal lengths through nested shapes. Find the shaded parts of two squares →