Junior Cycle · Area, Volume and Measurement
⏱ Tested in 1 exam question since 2024
Lesson 3 of 7
JCHL AVM 3: Triangles, Parallelograms and Trapeziums
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- Triangle: area = ½ × base × perpendicular height
- Parallelogram: area = base × perpendicular height (a triangle is half a parallelogram)
- Trapezium: area = ((a+b)/2) × h — average the two parallel sides, then × height
Formula used
Triangle: A = ½ah
Parallelogram: A = ah
Trapezium: A = ((a+b)/2)h
On page 9 of the log tables — read it off, don’t memorise.Most recent exam questions
- 2024 Q13(c)(ii)
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