Education resource centre

Definition of Technical drawing, Identification and uses of drawing method and equipment e.g. protractor, compasses, set – squares, Tee – square, drawing board etc.

-Show and identify drawing materials and equipment e.g. Protractor, compasses, set – square drawing sheets. Etc

-Demonstrates how these materials and instruments are used.

Identify drawing materials and equipment

-Use drawing materials and equipment to draw.

Drawing Instrument.

Technique of fixing drawing sheet to the drawing board, boarder line, title block and free hand lettering (lower and upper case letters).

- Demonstrate the techniques of drawing boarder line and title block.

-Demonstrate the techniques in lettering; e.g. Gothic, italic etc.

Fixing drawing sheets to the board

-Drawing bounder line and writing letters.

Drawing board, tee – square, pencil and sharpeners.

Safe use and care of drawing instruments and materials, clean habits, proper lighting and ventilation.

-Demonstrate healthful habits in the drawing studio, such as,

(a) No horse play

(b) No throwing of instruments, (Compasses and divides)

Observe and practice self handling of drawing instruments and materials

-Practice health habits in the drawing studio

Drawing instruments, Videos chips, posters and charts.

Types and uses of line (thin continuous line, thick continuous line, thin long – chain line, thick long drain line etc.) Drawing of parallel and unchained lines.

(b) Thin continuous line for projection, construction and dimension line.

(c) short dashes for hidden details

-Draw types of line

Construct parallels indeed lines using Tee – square and set square

Tee – square drawing bound, set square straight edge, pair of compasses, pencil. etc

Bisection and division of lines

- Demonstrate how to divide a given line into a number of equal parts.

- Demonstrate how to draw a parallel line using a pair of compasses.

Bashed a given line

Pencils, paper compasses etc.

Types of angles construction and division:

(a) acute

(b) obtuse

(c) reflex etc.

- Demonstrate how to construction various types of angles using compasses.

- Demonstrate how to bisect angles.

Constitution angles acute, reflex, obtuse.

Etc.

Models, posters charts, drawing instruments and materials.

Types of triangles and their construction such as:- isosceles, equilateral, scalene and right angled triangle.

-construction of triangles when:-

(a) given two sides and one angle

(b) two angles and one side

(c) three sides.

Identify triangles

-constitution triangles

Models, charts posterns and drawing instruments.

Circle and its parts.

e.g. chord, tangent, sector quadrant, radius etc.

-using chart, illustrate eccentric and concentric circles.

Draw a circle and label its parts.

Drawing instruments and materials.

Inscription, circumscription and ascription of triangles

(a) inscribed circle to a given triangle

(b) circumscribed circle to a give triangle

(c) ascribed circle to a given triangle

inscribed, circumscribed and ascribed circles

Drawing instrument and materials.

Inscribed, circumscribed and ascribed circles

Drawing instrument and materials.

Definition, types and properties e.g. square, rectangle kite, parallelogram etc.

Construction of quadrilaterals

e.g. square, rectangle, kite, parallelogram etc.

Participate in class discussion

-construction different types of quadrilaterals.

Pair of compasses, tee- square drawing bound, straight edge, models charts and posters.

(a) Regular and triangular

(b) Pentagon, hexagon heptagon etc.

-Heptagon seven sides, hexagon – six etc

Student Activity

Participate activity in class discussion

Teaching Materials

Models, chants, pastes and drawing materials.

Construction of various types of polygons. Using different methods

-avegular polygons using different methods e.g.

(a) Square Method

(b) circle Method

(c) Diagonal Method etc.

Construct polygons using different methods

Models, Charts, posters and Drawing Instrument.

-illustrates the constriction of scales

-Explain how to road plain and diagonal scales

-participate in the discussion

-observe and construct plain and diagonal scales.

-Read illustrated plain diagonal scales

Scale, Drawing bound and tee – square.

The concept and application of enlargement and reduction.

-explains the application of enlargement and reduction.

Participate in class discussion

Charts, posters and models

Enlargement and reduction of regular and irregular plane figures:- in style, quadrilaterals polygons etc.

Carry out excise on enlargement and reduction of give figures

Drawing board, tee square, fair of compasses charts, posters and models.

E.g. triangles on the same base and between parallel line have equal areas

-Explains the theorems of equal areas using triangles on the same base and between parallels have equal areas.

Discuss theorems of equal areas

Charts and posters

Demonstrates the constriction of plane figures of equal areas

Construct plane figures of equal areas

Drawing instrument, charts, and posters.

Principles and application of Tangency.

Construction

of talents to :-

(a) point on the circumference of the circle

(b) two equal and unequal circles

Demonstrates the construction of tangents of arcs to straight line.

Construction of tangents involving arcs (internal and external)

Conspired tangents involving touching

Internally and externally

Drawing instruments and materials

Construction of special curves using different methods

i) eclipse

ii) cycloids

iii) trochoids etc

The teacher demonstrate various method of constructing special curves:-

Participate actively in the definition of special curves

Construct eclipse, cycloids and trochoids using different methods:-

Models, chart, posters and drawing instrument.

-Meaning and applications of development

-Determination of true lengths.

Demonstrates how to determine true lengths of full and truncated solids:-

Discuss the meaning and application of development. Determine true lengths:-

Models, charts, posters, drawing instrument, card board, pair of scissors/knife

Surface developments of fill and truncated solids, e.g.

a) cones

b) pyramids

c) prisms

d) cylinders etc.

Develop the surface of full and truncated cones, pyramids and cylinders:-

Drawing instrument

Production of models of geometrical solids e.g.

a) prisms

b) cones

Develop models of geometrical solids:-

Drawing instrument, card boards, pair of scissors/knife

i) circles

ii) arcs

iii) chamfers

iv) vertical

v) horizontal and angular shapes

i) datum and

ii) chair dimensioning :-

dimension drawing:-

drawing instruments

Concept of isometric drawing

a) definition

b) isometric axis

c) three dimensional drawing etc.

Participate actively in class discussion:-

Models, charts, posters, 30^o/60^o set square, drawing materials

Draw isometric squares, rectangle and circles:-

Models, charts, posters, 30^o/60^o set-square drawing materials and instruments.

Construction of simple blocks in isometric drawing

Draw isometric block involving lines, arcs and circles:-

Drawing instruments and materials.

Meaning of oblique drawing, oblique drawing of shaped and geometrical solids

Demonstrate the drawing of shaped blocks and geometrical solids in oblique using

a) cabinet and

b) cavalier methods:-

differentiate between isometric and oblique drawing

draw shaped blocks and geometrical solids in oblique:-

drawing instruments and materials.

The use of computer in lettering and drawing:-

Corel draw and Harvard graphics