Math Problem Statement

Find the perimeter and area of the trapezoid with the following dimensions: top base = 7 in, bottom base = 14 in, height = 4 in, and slanted side = 8.06 in.

Solution

The worksheet asks for the following:

  1. Finding the perimeter of the figure (a trapezoid).
  2. Finding the area of the figure.

Step 1: Understanding the Given Dimensions

From the image:

  • The top base of the trapezoid is 7 in.
  • The bottom base of the trapezoid is 14 in.
  • The height (perpendicular distance between the two bases) is 4 in.
  • The slanted side (one of the non-parallel sides) is 8.06 in.

Solution:

1. Find the Perimeter

The perimeter is the sum of all the sides of the figure: Perimeter=Top base+Bottom base+Left side+Slanted side.\text{Perimeter} = \text{Top base} + \text{Bottom base} + \text{Left side} + \text{Slanted side}.

  • Top base = 7 in.
  • Bottom base = 14 in.
  • Left side = 4 in.
  • Slanted side = 8.06 in.

Perimeter=7+14+4+8.06=33.06in.\text{Perimeter} = 7 + 14 + 4 + 8.06 = 33.06 \, \text{in}.

2. Find the Area

The area of a trapezoid is given by: Area=12(Top base+Bottom base)Height.\text{Area} = \frac{1}{2} \cdot (\text{Top base} + \text{Bottom base}) \cdot \text{Height}.

  • Top base = 7 in.
  • Bottom base = 14 in.
  • Height = 4 in.

Area=12(7+14)4=12214=42square inches.\text{Area} = \frac{1}{2} \cdot (7 + 14) \cdot 4 = \frac{1}{2} \cdot 21 \cdot 4 = 42 \, \text{square inches}.

Final Answers:

  1. Perimeter: 33.06 in.
  2. Area: 42 square inches.

Would you like more details or further explanation?


5 Related Questions:

  1. What is the formula for the perimeter of other polygons like a triangle or rectangle?
  2. Can you generalize the formula for the area of any quadrilateral?
  3. How does changing the height affect the area of a trapezoid?
  4. What are the differences between a trapezoid and a parallelogram?
  5. What is the significance of the slanted side in determining the perimeter?

1 Tip:

Always label all dimensions clearly in geometry problems to avoid confusion when calculating area and perimeter.

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Math Problem Analysis

Mathematical Concepts

Perimeter
Area
Trapezoid
Geometry

Formulas

Perimeter = Top base + Bottom base + Left side + Slanted side
Area = 1/2 * (Top base + Bottom base) * Height

Theorems

Area of a trapezoid
Perimeter of a polygon

Suitable Grade Level

Grades 7-9