Calculadora de Área
Calcule a área de retângulos, triângulos e círculos.
Tabela de amortização
| # | Pagamento | Principal | Juros | Saldo |
|---|---|---|---|---|
Mostrando os primeiros 12 de meses.
Crescimento ao longo do tempo
| Ano | Investido | Valor |
|---|---|---|
Introdução
Area Calculator — Calculate area for rectangles, triangles, and circles. Enter Shape, A (length / base / radius), B (width / height) to get an instant, accurate result.
Fórmula
Rectangle: area = a×b. Triangle: area = ½×a×b (base × height). Circle: area = π×a² (a as radius).
Passo a passo
- Enter the Shape.
- Enter the A (length / base / radius).
- Enter the B (width / height).
- Click Calculate to see your result instantly.
Exemplo do mundo real
Example: With Shape = rectangle, A (length / base / radius) = 4, B (width / height) = 5, the Area Calculator gives Area: 20.
Perguntas Frequentes
Which shapes are supported?
Rectangle, triangle, and circle.
For a triangle, what do a and b represent?
Base and height, not two arbitrary sides.
What inputs does the Area Calculator need?
You'll need to provide: Shape, A (length / base / radius), B (width / height). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Area Calculator?
The Area Calculator applies the formula exactly as calculated — Rectangle: area = a×b. Triangle: area = ½×a×b (base × height). Circle: area = π×a² (a as radius). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Area Calculator free to use?
Yes, the Area Calculator is completely free, requires no signup, and runs instantly in your browser.
Sobre a Calculadora de Área
The Area Calculator uses a real, verifiable formula — Rectangle: area = a×b. Triangle: area = ½×a×b (base × height). Circle: area = π×a² (a as radius). — so results are accurate every time, not an approximation.