 # AREA OF PLANE FIGURES

Welcome to Class !!

In today’s Basic Technology class, We will be discussing Area of Plane Figures. We hope you enjoy the class! ### Definition of Area:

The area (A) of a closed plane figure is the region of the plane enclosed by the figure’s boundary. The area is measured in square units of length such as square centimetre (cm22) and square metre (m22).

 Triangle Area = ½ × b × h b = base h = vertical height Square Area = a2 a = length of side Rectangle Area = w × h w = width h = height Parallelogram Area = b × h b = base h = vertical height Trapezoid Area = ½(a+b) × h h = vertical height Circle Area = π × r2 Circumference = 2 × π × r r = radius Sector Area = ½ × r2 × θ r = radius θ = angle in radians

### Example: What is the area of this rectangle?

The formula is:

Area = w × h

w = width

h = height

We know w = 5 and h = 3, so:

Area = 5 × 3 = 15

### What is the area of a circle where

 Area = π × r2 = π × 32 = π × (3 × 3) = 3.14159… × 9 = 28.27 (to 2 decimal places)

### What is the area of a triangle where

Height = h = 12

Base = b = 20

Area = ½ × b × h = ½ × 20 × 12 = 120

We have come to the end of this class. We do hope you enjoyed the class?

Should you have any further question, feel free to ask in the comment section below and trust us to respond as soon as possible.

In our next class, we will be talking about Woodwork Machines. We are very much eager to meet you there.

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### 1 thought on “AREA OF PLANE FIGURES”

1. I love class note mh only problem is that when you downloas the app you will have to pay a sum of 300😍 😍

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