TLE 7-Module 2

TLE 7-Module 2

by Gayle Inso

​PERFORM CALCULATION AND BASIC ESTIMATION

TRIANGLES      The surface area or surface (A) of a triangle is calculated by the formula: 

Formula: A (triangle) = 0.5 x base x height = 0.5 x b x h (1) Triangles can have many shapes but the same formula is used for all of them.

EXAMPLE

Calculate the surface area of the triangles no. 1, no. 1a and no. 2

Given           Answer

Triangles no. 1 and no. 1a: base = 3 cm    Formula: A = 0.5 x base x height

height = 2 cm     = 0.5 x 3 cm x 2 cm = 3 cm²

Triangle no. 2:          base =3 cm     A = 0.5 x 3 cm x 2 cm = 3 cm²

height = 2 cm

It can be seen that triangles no. 1, no. 1a and no. 2 have the same surface; the shapes of the triangles are different, but the base and the height are in all three cases the same, so the surface is the same.

The surface of these triangles is expressed in square centimeters (written as cm²).

Surface areas can also be expressed in square decimeters (dm²), square meters (m²), etc...

Multiple Choice

What is the other formula for solving the surface area of a triangle?

• A= B x H

• A= L x W

• A=s²

• $$A\ =\ \frac{l\ x\ w}{2}$$

Multiple Choice

A SQUARE AND A RECTANGLE

 Note that in a square the length and width are equal and that in a rectangle the length and width are not equal.

• TRUE

• FALSE

​ INTRODUCTION TO PERCENTAGE

In relation to agriculture, the words percentage will be met regularly. For instance "60 percent of the total area is irrigated during the dry season". In this Section the meaning of the word "percentage" will be discussed.

​PERCENTAGE

The word "percentage" means literally "per hundred"; in other words one percent is the one hundredth part of the total. You can either write percent, or %, or 1/100, or 0.01. Some examples are:

5 percent = 5% =5/100 = 0.05

20 percent = 20% = 20/100= 0.20

 25 percent = 25% = 25/100 = 0.25

50 percent = 50% = 50/100 =0.50

100 percent = 100% = 100/100 = 1

150 percent = 150% = 150/100 = 1.5

Multiple Choice

What is the 75% of 500?

• 345

• 375

• 350

​C.  Find the area in hectare of the following.  (1 hectare is 10,000 m²)  

1.    800 m x 800 m   = _______

​Where: 1 hectare is =10,000m²

​

​800m x 800m= 640,000 m²

​ 10,000 m²

​ =64 hectares

Multiple Choice

Solve 950m x 850m in hectares.

• 75.80 hectares

• 80.75 hectares

• 8075 hectares

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Multiple Choice

How many inches are there in 1 foot?

• 10

• 1

• 12

Multiple Choice

If 12 inches is equal to 1 foot,How many cm are there in 1 foot if 1 inch is equal to 2.54cm?

• 30

• 3048 cm

• .3048 cm

Multiple Choice

1 kilometer is equal to 1000 m, How many kilometers are there in 10,500 m?

• 1005km

• 15

• 10.5 km

Multiple Choice

Fertilizers are considered as____.

• Farm input

• Fa

• Farm equipment

Multiple Choice

Weeding is also considered as_____.

• Fa

• F

• F

Open Ended

What is the importance of conversion in our daily lives? How can we apply conversion in our daily activities? you are given 5 minutes to answer.

​Thank you for your time in answering our activity.

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