Back to Course

## SS1: MATHEMATICS - 3RD TERM

0% Complete
0/0 Steps

#### Quizzes

Lesson 6, Topic 1
In Progress

# Mensuration

Lesson Progress
0% Complete

#### Topic Content:

• Mensuration
ShapePerimeter Area
Rectangle
Perimeter
= 2(l + b)
Area
= l Ã— b
= lb
Parallelogram
Perimeter
= 2(a + b)
Area
= b Ã— h
= ab sinÎ¸
Trapezium
Perimeter
= a + b + c + l
Area
= $$\frac{1}{2} \scriptsize (a + b) \: \times \: h$$
Triangle
Perimeter
= a + b + c
Area
= $$\frac{1}{2} \scriptsize \: \times \:b \: \times \: h$$

Area = $$\frac{1}{2} \scriptsize ab \: Sin C$$

Area = $$\frac{1}{2} \scriptsize ac \: Sin B$$

Area = $$\frac{1}{2} \scriptsize bc \: Sin A$$
Square
Perimeter
= 4d
Area
= $$\scriptsize d^2$$
Circle
Perimeter
= $$\scriptsize 2\pi r = \pi d$$
Area
= $$\scriptsize \pi r^2$$

### Example 6.1.1:

The diagram below shows the altitudes $$\scriptsize \overline{QT} \: and \: \overline{PM} \: of \: \Delta PQR$$

If |QR| = 8 cm, |PR| = 7 cm and |QT| = 4 cm, what is |PM|? (WAEC)

Solution:

There are two different triangles with different heights and their areas are equal.

You are viewing an excerpt of this Topic. Subscribe Now to get Full Access to ALL this Subject's Topics and Quizzes for this Term!

Click on the button "Subscribe Now" below for Full Access!

### Subscribe Now

Note: If you have Already Subscribed and you are seeing this message, it means you are logged out. Please Log In using the Login Button Below to Carry on Studying!