|
|
|
$$2p = 2b + 2S$$
Perimeter
$$b = \frac{2p - 2S}{2}$$
Base
$$S = \frac{2p - 2b}{2}$$
Oblique Side
$$A = b \times h$$
Area
$$b = \frac{A}{h}$$
Base
$$h = \frac{A}{b}$$
Height
Definition
A parallelogram is a quadrilater with opposite sides parallel (and congruent).
Properties
- Opposite sides are congruent and parallel
- Opposite angles are congruent, consecutive angles are supplementary (their sum is 180°)
- Diagonals intersect in their midpoint
Parallelogram Formulas
| Data | Formula |
|---|---|
| Perimeter | 2p = 2 × b + 2 × S |
| Area | A = b × h |
| Base | b = A / h |
| Height | h = A / b |
| Base | b = (2p - 2 × S) / 2 |
| Oblique Side | S = (2p - 2 × b) / 2 |