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Step-4

Title: Area of 2D shapes

Grade: 8-a Lesson: S1-L5

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	A billiards table has a horizontal radius of measurement 8cm and a vertical radius of 5 cm. Calculate the area of the ellipse.
2	Step	Given that the horizontal radius (a) is the vertical radius (b) is	8 cm 5 cm
3	Formula:	To calculate the area of an ellipse, you can use this simple formula.	Area = π × horizontal radius × vertical radius
4	Step	Substitute the values	Area = π × 8 × 5 = 40π
5	Step	Since π (pi) is approximately	3.14159
6	Step	Substitute the pi value	Area = 40 × 3.14159 = \$125.66(cm)^2\$
7	Step	So, the area of the ellipse is	\$125.66(cm)^2\$
8		Answer	B

Step

Type

Explanation

Answer

Problem

A billiards table has a horizontal radius of measurement 8cm and a vertical radius of 5 cm. Calculate the area of the ellipse.

Step

Given that the horizontal radius (a) is

the vertical radius (b) is

8 cm

5 cm

Formula:

To calculate the area of an ellipse, you can use this simple formula.

Area = π × horizontal radius × vertical radius

Step

Substitute the values

Area = π × 8 × 5
= 40π

Step

Since π (pi) is approximately

3.14159

Step

Substitute the pi value

Area = 40 × 3.14159 = \$125.66(cm)^2\$

Step

So, the area of the ellipse is

\$125.66(cm)^2\$

Answer