Understanding Area Calculations in Square Inches
Learn how to calculate the area in square inches for different shapes using simple formulas.
Rectangle:
\[ A = l \times w \]
Square:
\[ A = s^2 \]
Circle:
\[ A = \pi r^2 \]
Triangle:
\[ A = \frac{1}{2} \times b \times h \]
Where:
- \(A\) = Area in square inches
- \(l\) = Length in inches
- \(w\) = Width in inches
- \(s\) = Side length in inches
- \(r\) = Radius in inches
- \(b\) = Base in inches
- \(h\) = Height in inches
Calculation Steps
- Measure the dimensions in inches
- Select the appropriate shape formula
- Substitute the measurements into the formula
- Perform the calculations to find the area in square inches
Example Calculation
Problem:
Calculate the area of a rectangular sheet in square inches:
- Length = 24 inches
- Width = 18 inches
Solution:
- Use the rectangle formula: \[ A = l \times w \]
- Substitute the values: \[ A = 24 \text{ inches} \times 18 \text{ inches} \]
- Calculate: \[ A = 432 \text{ square inches} \]
Visual Reference