Example 1
\(l = 8, w = 5 \rightarrow A = 8 \times 5 = 40\) units², \(P = 2(8 + 5) = 26\) units
長方形面積計算機
長さと幅を使用して詳細なステップバイステップの解法で長方形の面積と周囲を計算
結果
値を入力して計算をクリックして結果を表示してください。
Theory & Formula
The area of a rectangle is the space enclosed by its four sides. It is calculated by multiplying the length by the width.
The perimeter is the total distance around the rectangle, calculated by adding all four sides or using the formula 2(l + w).
Properties
- Opposite sides are equal and parallel
- All angles are 90 degrees (right angles)
- Diagonals are equal in length and bisect each other
- A square is a special case where l = w
\(A = l \times w, P = 2(l + w)\)
Worked Examples
Example 2
\(l = 12, w = 3 \rightarrow A = 12 \times 3 = 36\) units², \(P = 2(12 + 3) = 30\) units