Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Area of 3D shapes |
Grade: 1300-a Lesson: S3-L6 |
Explanation: Hello Students, time to learn examples. Let us take turns and read each example. Explain each step. Pay special attention to steps and pictures and communicate in your own words. |
Examples:
What’s the area of a 3D shape with a side length of 6 m, height of 6 m, the radius is 4 m, and width of 5 m? Use value π is 3.14
Step 1a
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The first 3D shape is a cube. To calculate the area of a cube, use the formula: \$216m^2\$. |
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Explanation: Finding the area of a cube is a simple task when the formula is used: \$A = 6 \times s^2 = 216m^2 \$. |
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Step 2a
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The next 3D shape is a cuboid. To calculate the area of a cuboid, use the formula: \$192(m)^2\$ |
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Explanation: Finding the area of a cuboid is a simple task when the formula is used: \$A = 2(lw + lh + wh = 192m^2)\$. |
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Step 3a
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The third 3D shape is a rhombus. To calculate the area of a cylinderical shape, use the formula: \$251.2(m)^2\$ |
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Explanation: Finding the area of a rhombus is a simple task when the formula is used \$A = 2πr(h + r)\$ i.e., \$A = 251.2(m)^2\$ |
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