Drawing

Presentation scope This presentation is purely for you to practice : –Drawings of different object views –Calculating the material required

Area Materials such as plastic and plywood are sold per square metre 1 metre 1 square metre 3 metres 2 metres 6 square metres

Exercise I wish to cover the roof of the chicken hut in plastic sheeting to make it waterproof. How much plastic should I buy? How much should I buy to cover the bamboo hut roof? How much should I buy to cover the weather station roof?

Your Turn! Now find the area of the roof of your design! SCALE ?

Area of a Triangle 4 metres 5 metres 4 metres Area = 0.5 x base x height Height Base 8 square metres 10 square metres

Drawing I wish to paint all four sides of the bamboo hut and weather station. I wish to cut two new full metal panels for the ends of the chicken hut, and paint them. How many pots of paint do I need? How much will it cost? 1 pot paints 2 square metres 50 rupees per pot

Your Turn! Now find the areas of the walls of your design! SCALE

Activity – 1

Activity – 2

Activity – 3

Drawing SCALE

Circumference = hello x diameter Circles Diameter Radius = 3.14 Area = x radius 2 (radius 2 = radius x radius)

Drawing What is the area of the base of your water tank? Area = x radius 2

Volume Volumes are measured in cubic metres 1 metre 1 square metre 1 metre 1 cubic metre 1 metre

Drawing 2 metres 3 metres 12 cubic metres 2 metres 1 metre 0.5 metres 1 cubic metre 2 metres

Volume of a Cylinder 2 metres radius height 3 metres 36 cubic metres Area of circle = x radius 2 (radius 2 = radius x radius) Volume cylinder = Height x Area Volume cylinder = 3 x 12 Area of circle = 3 x 2 x 2 = 12 m 2 = 36 m 3

Drawing How many litres of water can my tank hold? Hint: 1 cubic metre = 1000 litres