Junior Certificate Technical Graphics

Junior Certificate Technical Graphics

Introduction or Tester Programme

SectorSemicircle

Quadrant

Segment

Diamete

r Radius

Normal

Tange

nt

Chord

Technical GraphicsCommunicates Information

Technical Graphics is a Universal Language

• Technical Graphics is one of the technology subjects offered at junior cycle.

• In Technical Graphics students use drawing equipment to create precise and accurate drawings.

• These drawings are used to communicate ideas or solve problems.

What is Technical Graphics

How to produce neat drawings of everyday items

How to represent 3-D objects on paper How to create models of objects on the

computer How to use freehand sketching, colouring

and shading to represent objects

What will I learn in Technical Graphics?

Communication skills Problem solving skills Computer skills Creative thinking skills

Skills developed in Technical Graphics

Communication Skills

Problem Solving Skills

Problem Solving Skills

Computer Skills

Creative Thinking Skill

Design Skills

Technical Graphics can be very useful in other subjects such as: Mathematics Construction Studies Materials Technology Wood Engineering Technology & Metalwork Junior & Leaving Certificate Technology Art

Is Technical Graphics Useful in Other Subjects?

Project Maths

Technical Graphics

The Relationship between …

Applications of Geometry and Problem

Solving

Technical Graphics

Project Maths

Ordinary Level◦Paper 2◦Leaving Certificate

Some Examples......

Higher Level◦Paper 2◦Leaving Certificate

Some Examples......

Some Examples......

Higher Level◦Paper 2◦Leaving Certificate

P

R

Q

Gridlines

From these exercises you will learn:

◦ The difference between construction lines and finish lines

◦ The importance of draftsmanship◦ The effect of shading and rendering on a drawing◦ What indexing is, and how it can assist

complicated drawings

Learning Aims and Objectives

Activity 1

Activity 1

Activity 2

Activity 2

Activity 3 & 4

Activity 3 & 4

Activity 5

1 2 3 4 5

1

2

34

5

1 2 3 4

1

2

3

4

234 55

5

1

2

3

4

1

2

34

2345

5

2

34

1 2 3 4

2

3

4

51234

Activity 5

Activity 6

Activity 6

Polygons

From these exercises you will learn:◦ The name and properties of various polygons◦ What indexing is, and how it can assist

complicated drawings◦ How to construct a Hexagon using a compass◦ How to construct an Octagon using a square and

a compass◦ That joining points in a different order can

produce different shapes◦ The importance of draftsmanship◦ The effect of shading and rendering on a drawing

Learning Aims and Objectives

Equilateral Triangle Square

Pentagon Hexagon Heptagon

Octagon Nonagon Decagon Circle

Polygons

Pentagons

Activity 7

1

2

34

5

Activity 7

Activity 8

1

2

34

5

Activity 8

Activity 9

1

2

34

5

Activity 9

Hexagons

Activity 10

Set your compass at the required radius and do not change it.

12

3

4

5

6

Activity 10

Activity 11

1

2

3

4

5

6

Activity 11

Activity 12

1

2

3

4

5

6

Activity 12

Activity 13

1

2

3

4

5

6

Activity 13

Activity 14

1

2

3

4

5

6

Activity 14

Activity 15

1

2

3

4

5

6 7

8

9

12

11

10

Activity 15

Activity 16

1

2

3

4

5

6

7

8 9

Activity 16

Activity 17

1

2

3

4

5

6 7

8

910

11

12

Activity 17

Activity 18

1

2

3

4

5

6 7

8

9

12

11

10

Activity 18

Octagons

Activity 19

1 2

3

4

56

7

8

Activity 19

Activity 20

1

2

3

4

5

6

7

8

Activity 20

Activity 21

1

2

3

4

5

6

7

8

Activity 21

Activity 22

1

2

3

4

5

6

7

8

Activity 22

Activity 23

1

2

3

4

5

6

7

8

Activity 23

Activity 24

1

2

3

4

5

6

7

8

Activity 24

The Ellipse

From these exercises you will learn:◦ How to construct an ellipse using the trammel

method◦ How to construct an ellipse using the compass

method◦ Application of the ellipse in everyday life◦ The importance of draftsmanship◦ The effect of shading and rendering on a drawing

Learning Aims and Objectives

Ellipse

Ellipse

Cylinder

Ellipse

Cone

Ellipse: Applications

Inside an Atom

Activity 25 & 26

½ Minor AxisTrammel Method

½ Major Axis

Min

or A

xis

Major Axis

P A B

P

A

B

P

A

B

P

A

B

P

A

B

Activity 25

Major Axis

Min

or A

xis

Major Circle

Minor Circle

30°60°

½Major Axis

F2F1

Activity 26

Visualization Exercises

Activity 27

Activity 28

Activity 29

Activity 30

4223

3334

2323

1313

Activity 31

1111

2311

3242

211

Activity 32

22

4224

3142

Activity 33

3

4

1342

31

31

Activity 34