This page details the area calculations for various geometric shapes, providing essential formules de géométrie pour le secondaire.

Definition: Area (A) represents the amount of space inside a two-dimensional shape.

Example: The area of a rectangle is found by multiplying length by width: A = L × W

Highlight: Essential area formulas include:

• Rectangle: A = length × width
• Square: A = side × side
• Circle: A = π × radius²
• Parallelogram: A = base × height
• Rhombus: A = (diagonal × diagonal) ÷ 2
• Triangle: A = (base × height) ÷ 2
• Trapezoid: A = $(base₁ + base₂) × height$ ÷ 2

This page focuses on calcul des volumes de solides géométriques, presenting formulas for three-dimensional shapes.

Definition: Volume (V) is the amount of space occupied by a three-dimensional object.

Example: The volume of a rectangular prism is calculated by multiplying length × width × height

Highlight: Key volume formulas include:

• Rectangular Prism: V = length × width × height
• Cube: V = side³
• Cylinder: V = base area × height
• Prism: V = base area × height
• Pyramid: V = ⅓ × base area × height
• Cone: V = ⅓ × base area × height

Vocabulary:

• Abase: base area
• h: height
• L: length

This page presents comprehensive perimeter formulas for basic geometric shapes. The formulas are organized systematically for easy reference and practical application.

Definition: Perimeter (P) is the total distance around the outside of a two-dimensional shape.

Example: For a rectangle, the perimeter is calculated by adding all four sides: P = 2 × $length + width$

Highlight: Key formulas include:

• Rectangle: P = 2 × $length + width$
• Square: P = 4 × side
• Circle: P = 2 × π × radius
• Parallelogram: P = 2 × $base + side$
• Triangle: P = a + b + c
• Trapezoid: P = a + b + c + B

Vocabulary:

• c: side length (côté)
• r: radius
• b: base
• h: height