MATHEMATICSGeometry
Perimeter, Area & Volume
A
P
cm²
● Learning Path Verified 11+
Perimeter, Area & Volume
Calculate the boundary length and interior space of 2D shapes.
Area Explorer ✨ProMode Academy
Perimeter
200cm
Area
2400cm²
Change dimensions to see how area and perimeter shift!
What you'll learn
Core 11+ exam skills
Perimeter of Polygons
Find the total distance around any 2D shape by adding all side lengths.
Area of Rectangles
Apply the length × width formula to find total interior space.
Area of Triangles
Master the half × base × perpendicular height calculation.
Compound Shapes
Deconstruct complex L-shapes or composite forms into simpler parts.
Core Framework
The mechanics of Perimeter, Area & Volume
Perimeter
The total distance around the outside rim of a shape.
Area
The total space inside a 2D shape.
Triangles
Area = (Base × Perpendicular Height) ÷ 2.
Compound Shapes
Split complex shapes into simple rectangles.
Key Facts to Remember
💡
Perimeter is measured in regular units (cm, m).
🔄
Area is measured in squared units (cm², m²).
➕
You cannot find area by multiplying slanted triangle side lengths.
➖
Always make sure unit types match before calculating!
Ready to practise?
Choose your mode