‹
🧮
Shapes
· Formula🧮 Formula Reference Sheet
Triangle: 3 sides, angles sum 180° Square: 4 equal sides, 4 right angles Rectangle: 4 sides, opposite equal Circle: all points equidistant from centre Polygon angles sum: (n−2) × 180°
⚡ Example per formula
Triangle: 3 sides, angles sum 180°
↳3 sides, angles add to 180°
Square: 4 equal sides, 4 right angles
↳4 sides, side 5 → perimeter 20
Rectangle: 4 sides, opposite equal
↳8 × 5 area = 40
Circle: all points equidistant from centre
↳r=7 → area = 49π ≈ 154
Polygon angles sum: (n−2) × 180°
↳Hexagon: (6−2)×180° = 720°
✏️
Practice Exercises →
5 graded problems · AI checks each step