Problem Analysis:
The image provided shows a geometric figure drawn on a grid. The task is to calculate the area of the shaded region within this figure. To solve this, we will use the
grid method and break the problem into manageable steps.
Step-by-Step Solution:
1.
Understand the Grid:
- Each small square in the grid has a side length of 1 unit.
- Therefore, the area of each small square is \(1 \times 1 = 1\) square unit.
2.
Identify the Shaded Region:
- The shaded region is a complex polygon with irregular boundaries.
- We will divide the shaded region into simpler shapes (rectangles, triangles, etc.) to calculate the area more easily.
3.
Break Down the Shaded Region:
- The shaded region can be divided into several parts:
- A large rectangle at the bottom.
- A smaller rectangle in the middle.
- Triangular sections around the edges.
4.
Calculate the Area of Each Part:
#### Part 1: Large Rectangle at the Bottom
- The large rectangle at the bottom has dimensions:
- Length: 10 units (from left to right).
- Width: 3 units (from bottom to top).
- Area of the large rectangle:
\[
\text{Area}_{\text{large rectangle}} = 10 \times 3 = 30 \text{ square units}
\]
#### Part 2: Smaller Rectangle in the Middle
- The smaller rectangle in the middle has dimensions:
- Length: 6 units (from left to right).
- Width: 2 units (from bottom to top).
- Area of the smaller rectangle:
\[
\text{Area}_{\text{smaller rectangle}} = 6 \times 2 = 12 \text{ square units}
\]
#### Part 3: Triangular Sections
- There are several triangular sections around the edges of the shaded region. We will calculate the area of each triangle separately.
-
Triangle 1 (Top Left):
- Base: 2 units.
- Height: 2 units.
- Area:
\[
\text{Area}_{\text{triangle 1}} = \frac{1}{2} \times 2 \times 2 = 2 \text{ square units}
\]
-
Triangle 2 (Top Right):
- Base: 3 units.
- Height: 2 units.
- Area:
\[
\text{Area}_{\text{triangle 2}} = \frac{1}{2} \times 3 \times 2 = 3 \text{ square units}
\]
-
Triangle 3 (Bottom Left):
- Base: 2 units.
- Height: 1 unit.
- Area:
\[
\text{Area}_{\text{triangle 3}} = \frac{1}{2} \times 2 \times 1 = 1 \text{ square unit}
\]
-
Triangle 4 (Bottom Right):
- Base: 3 units.
- Height: 1 unit.
- Area:
\[
\text{Area}_{\text{triangle 4}} = \frac{1}{2} \times 3 \times 1 = 1.5 \text{ square units}
\]
5.
Sum the Areas:
- Total area of the shaded region:
\[
\text{Total Area} = \text{Area}_{\text{large rectangle}} + \text{Area}_{\text{smaller rectangle}} + \text{Area}_{\text{triangle 1}} + \text{Area}_{\text{triangle 2}} + \text{Area}_{\text{triangle 3}} + \text{Area}_{\text{triangle 4}}
\]
\[
\text{Total Area} = 30 + 12 + 2 + 3 + 1 + 1.5 = 49.5 \text{ square units}
\]
Final Answer:
\[
\boxed{49.5}
\]
Parent Tip: Review the logic above to help your child master the concept of graphing connect the dots.