GCSE Maths Practice: circle-properties

Question 10 of 10

This question teaches students which formulas involve π.

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\( \begin{array}{l}\text{Which of the following involve the constant } \pi\text{?}\end{array} \)

Select all correct options:

Remember: π is only used in circle-related formulas like area and circumference.

Pi (π) is a constant representing the ratio of circumference to diameter. It is used in formulas for the area of a circle (πr²) and circumference (2πr or πd). Rectangles and cuboids do not involve π. Understanding where π applies is fundamental for circle-related calculations and avoiding mistakes. Students should practise identifying formulas requiring π and apply them in geometric calculations. Mastery ensures accuracy in exams and real-world applications such as engineering, design, and physics. Visual diagrams of circles with radius and diameter marked help students conceptualize why π appears in these formulas.