To find the correct path through the maze, we need to calculate the surface area of the shape in the highlighted yellow box and see which number matches it.
Step 1: Identify the shape and its dimensions.
The shape in the yellow box is a
square pyramid. This means it has a square base and four triangular faces that meet at a point at the top.
From the diagram, we can see:
* The side length of the square base ($s$) is
8 m.
* The slant height of the triangular faces ($l$) is
9 m. (This is the height of the triangle from the base to the tip, not the vertical height of the pyramid).
Step 2: Calculate the area of the base.
The base is a square.
$$ \text{Area of Base} = \text{side} \times \text{side} $$
$$ \text{Area of Base} = 8 \, \text{m} \times 8 \, \text{m} = 64 \, \text{m}^2 $$
Step 3: Calculate the area of the four triangular faces (Lateral Area).
Each face is a triangle with a base of 8 m and a height (slant height) of 9 m.
$$ \text{Area of one triangle} = \frac{1}{2} \times \text{base} \times \text{height} $$
$$ \text{Area of one triangle} = \frac{1}{2} \times 8 \, \text{m} \times 9 \, \text{m} $$
$$ \text{Area of one triangle} = 4 \, \text{m} \times 9 \, \text{m} = 36 \, \text{m}^2 $$
Since there are 4 identical triangular faces:
$$ \text{Total Lateral Area} = 4 \times 36 \, \text{m}^2 = 144 \, \text{m}^2 $$
Step 4: Calculate the Total Surface Area.
Add the area of the base and the total lateral area together.
$$ \text{Total Surface Area} = \text{Area of Base} + \text{Total Lateral Area} $$
$$ \text{Total Surface Area} = 64 \, \text{m}^2 + 144 \, \text{m}^2 $$
$$ \text{Total Surface Area} = 208 \, \text{m}^2 $$
Conclusion:
The calculated surface area is
208 m². Looking at the arrows connected to the yellow box, the arrow pointing down leads to a box labeled
208 m², which confirms our calculation is the correct key to unlock the next part of the maze.
Final Answer:
208 m²
Parent Tip: Review the logic above to help your child master the concept of volume of pyramids and cones worksheet answers.