Choose a quadrilateral. Click the card to open solved examples and auto-checked practice.
Quadrilateral
Square
A square has 4 equal sides and 4 right angles.
Area = a²
Quadrilateral
Rectangle
A rectangle has opposite sides equal and 4 right angles.
Area = l × w
Quadrilateral
Parallelogram
A parallelogram has two pairs of parallel sides.
Area = base × height
Quadrilateral
Trapezium
A trapezium has one pair of parallel sides.
Area = ½(a+b)h
Quadrilateral
Rhombus
A rhombus has 4 equal sides. Its diagonals help find the area.
Area = ½d₁d₂
Quadrilateral
Kite
A kite has two pairs of equal adjacent sides.
Area = ½d₁d₂
Square
A square has equal sides. To find area, multiply side × side.
Solved Examples
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Rectangle
A rectangle has length and width. Multiply them to find area.
Solved Examples
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Parallelogram
Use the straight height, not the slanted side. Area = base × height.
Solved Examples
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Trapezium
Add the two parallel sides first. Then multiply by height and divide by 2.
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Rhombus
A rhombus has two diagonals. Multiply the diagonals, then divide by 2.
Solved Examples
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Kite
A kite also uses the diagonal formula: Area = ½d₁d₂.