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Area of a Trapezium (Trapezoid)
A = ½ (a + b) × h
Where: A = Area, a = a, b = b, h = height (distance between the parallel sides)
Use the same units for all lengths (e.g. all in cm); areas come out in cm², volumes in cm³.
Solved example
Given: a = 7, b = 5, h = 10
Find: A (Area)
- Formula: A = h·(a/2 + b/2)
- Substitute the values: A = 10·(5/2 + 7/2)
- Result: A = 60
Answer: A = 60
Calculator
How to calculate Area of a Trapezium (Trapezoid)
- Write down the formula: A = ½ (a + b) × h.
- Note the known values (a, b, h).
- Substitute them and simplify to find A.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Area of a Trapezium (Trapezoid)?
The formula is A = ½ (a + b) × h, where A = Area, a = a, b = b, h = height (distance between the parallel sides).
What is Area of a Trapezium (Trapezoid) when a = 7, b = 5, h = 10?
A = 60. Substitute the values into A = ½ (a + b) × h and simplify.