Math Problem Statement

Aaron drew the figure below for a school art project. What is the total area of the figure?

Solution

To solve for the total area of the figure, we can break it down into its components and then sum the areas.

Breakdown of the shape:

  1. Left rectangle:

    • Dimensions: 4.25inches×4inches4.25 \, \text{inches} \times 4 \, \text{inches}
    • Area: Area=4.25×4=17square inches\text{Area} = 4.25 \times 4 = 17 \, \text{square inches}
  2. Middle trapezoid:

    • Height: 3inches3 \, \text{inches}
    • Shorter base: 2.75inches2.75 \, \text{inches}
    • Longer base: 4inches4 \, \text{inches}
    • Area formula: A=12×(base1+base2)×heightA = \frac{1}{2} \times (\text{base}_1 + \text{base}_2) \times \text{height}
    • Area: A=12×(2.75+4)×3=12×6.75×3=10.125square inchesA = \frac{1}{2} \times (2.75 + 4) \times 3 = \frac{1}{2} \times 6.75 \times 3 = 10.125 \, \text{square inches}
  3. Right triangle:

    • Base: 3inches3 \, \text{inches}
    • Height: 2.5inches2.5 \, \text{inches}
    • Area formula: A=12×base×heightA = \frac{1}{2} \times \text{base} \times \text{height}
    • Area: A=12×3×2.5=3.75square inchesA = \frac{1}{2} \times 3 \times 2.5 = 3.75 \, \text{square inches}

Total Area:

Summing all the areas of the components:

Total Area=17(rectangle)+10.125(trapezoid)+3.75(triangle)=30.875square inches\text{Total Area} = 17 \, \text{(rectangle)} + 10.125 \, \text{(trapezoid)} + 3.75 \, \text{(triangle)} = 30.875 \, \text{square inches}

Thus, the total area of the entire figure is 30.875 square inches.

Let me know if you need more details or have any questions!

Here are 5 relative questions to expand on this:

  1. What is the general formula for the area of a trapezoid?
  2. How does the height of a shape affect its area?
  3. Can the area formula for a rectangle be used for parallelograms?
  4. What happens to the area when both the height and the base of a triangle are doubled?
  5. How would the total area change if the left rectangle's width was increased by 2 inches?

Tip:

Always remember that composite shapes can be broken down into simpler components like rectangles, triangles, and trapezoids for easier area calculation.

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Math Problem Analysis

Mathematical Concepts

Geometry
Area Calculation
Composite Figures

Formulas

Area of a rectangle: A = length × width
Area of a trapezoid: A = 1/2 × (base1 + base2) × height
Area of a triangle: A = 1/2 × base × height

Theorems

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Suitable Grade Level

Grades 5-7