TOPIC 11: PERIMETERS AND AREAS ~ MATHEMATICS FORM 1
PERIMETERS AND AREAS
Perimeters of Triangles and Quadrilaterals
The Perimeters of Triangles and Quadrilaterals
Find the perimeters of triangles and quadrilaterals
Perimeter β is defined as the total length of a closed shape.
It is obtained by adding the lengths of the sides inclosing the shape.
Perimeter can be measured in ππ , ππ ,ππ ,π,ππ e. t. c
PERIMETERS AND AREAS
Examples
PERIMETERS AND AREAS
Example 1
Find the perimeters of the following shapes
Solution
- Perimeter = 7π + 7π + 3π + 3π = 20 π
- Perimeter = 2π + 4π + 5π = 11 π
- Perimeter = 3ππ + 6ππ + 4ππ + 5ππ + 5 ππ + 4ππ = 27 ππ
Areas of Circle
Calculate areas of circle
Consider a circle of radius r;
PERIMETERS AND AREAS
Example 5
Find the areas of the following figures
PERIMETERS AND AREAS
Example 6
A circle has a circumference of 30 π. What is its area?
Given circumference, πΆ = 30 π
C = 2ππ
PERIMETERS AND AREAS
Nice I Like That a lot gives you five full star, #teacher hansy kipanya#