How to Calculate the Areas of Triangles and Quadrilaterals
The area of a triangle is half the base times the height. For a quadrilateral, split it into triangles or use the formula for its type, since a trapezoid, parallelogram, and rhombus each have their own shortcut.
Free tool: try the problems from this lesson in our Area & Perimeter Calculator.
Worked examples: areas of triangles and quadrilaterals
Practice questions on triangle and quadrilateral area
- Determine the area of a triangle with a base of (12 text{cm}) and a height of (8 text{cm}).
- Calculate the area of a square with a side length of (6 text{cm}).
- What is the area of a parallelogram with a base of (9 text{cm}) and a height of (5 text{cm})?
- A rhombus has one diagonal measuring (15 text{cm}). If its area is (45 text{cm}^2), find the length of the other diagonal.
- (48 text{cm}^2).
- (36 text{cm}^2).
- (45 text{cm}^2).
- (6 text{cm}).
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Original price was: $109.99.$54.99Current price is: $54.99.
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