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Lesson Topics Discussion Quiz: Class Homework

Example1

Title: Geometry

Grade Lesson s4-p2

Explanation: The best way to understand PSAT-4 is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1 Example2

What’s the volume of a 3D shape with a side length of 5m, a height of 6m, a radius is 3m, and a width of 7m? Use the value π is 3.14.

Step: 1

The first 3D shape is a sphere.

First, calculate the volume of a sphere using the formula: \$A = 4/3 πr^3 = 113.04 (m)^3\$.

Explanation:

In this step, the initial 3D shape is a sphere. First, calculate the volume of the cube using the formula:

\$A = 4/3 πr^3 = 113.04 (m)^3\$

Step: 2

The next 3D shape is a cone.

To calculate the volume of a cone, use the formula: \$V = 1/3 πr^2h\$, where 56.52 cubic meters represents the total volume.

Explanation:

In this step, calculate the volume of a cone, using the formula: \$V = 1/3 πr^2h\$,

where 'r', and 'h' represent the radius and height, respectively, the total volume is 56.52 cubic meters.

Step: 3

The next 3D shape is a rectangular prism.

To calculate the volume of a rectangular prism, use the formula: \$"length" \times "width" \times "height"\$ where 210 cubic meters represent the total volume.

Explanation:

In this step, calculate the volume of a rectangular prism, using the formula: \$"length" \times "width" \times "height"\$,

where 'r', and 'h' represent the radius and height, respectively, the total volume is 210 cubic meters.