Mensuration and CalculationAQA GCSE Maths: Flashcards

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What is the area formula for a triangle?

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What is the area formula for a triangle?: $\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$
What is the area formula for a trapezium?: $\text{Area} = \frac{1}{2}(a+b)h$ , where $a$ and $b$ are the parallel sides.
State the formula for the circumference of a circle.: $C = 2\pi r = \pi d$
State the formula for the area of a circle.: $A = \pi r^2$
What is the formula for the area of a sector with angle $\theta$ ?: $\frac{\theta}{360} \times \pi r^2$
What is the formula for the arc length of a sector with angle $\theta$ ?: $\frac{\theta}{360} \times 2\pi r$
How do you find the volume of a prism?: Cross-sectional area $\times$ length.
What is a frustum?: A cone or pyramid with the top cut off by a plane parallel to the base.
What is a composite shape?: A shape made by combining two or more basic shapes.
Find the area of a rectangle 5 cm by 8 cm.: $5 \times 8 = 40\text{ cm}^2$
A circle has radius 3 cm. What is its area in terms of $\pi$ ?: $\pi \times 3^2 = 9\pi\text{ cm}^2$