CBSE Book Class 7 Maths Activity 10A

To draw a cube with given edge (say 5 cm long) on an isometric dot paper and to draw its oblique sketch on the squared paper.

Learning Objective : To develop skill of drawing three dimensional shapes on two dimensional sheet.

Pre-requisite : Familiarity with isometric dot paper. Knowledge of horizontal, vertical and standing lines.

Materials Required : Isometric dot paper, a ruler, a sketch pen and a squared dot paper pencil.

Procedure : 

Step 1. Take an isometric dot paper and mark a point A on it [Fig. 10 A(a).

Step 2. Draw a horizontal line through A.

Step 3. Identify 3 dots nearest to the point A which are above the horizontal line and mark them, X ; Y and Z with pencil. [Fig. 10 A(b)]

Step 4.v Starting from point A, move 5 dots along AX and mark fifth dot as B. [Fig. 10 A(b)]

Step 5. Starting from the point B, move 5 dots upward and mark the fifth dot as C. [Fig. 10 A(b)]

Step 6. Starting from the point A, move 5 dots along AY and mark the fifth dot as D. [Fig. 10 A(b)]

Step 7.Starting from the point A, move 5 dots along AZ and mark the 5th dot as E.[Fig. 10 A(b)]

Step 8. Starting from the point E move 5 dots in the upward direction and mark the fifth dot as F. [Fig. 10 A(b)]

Please refer to the link below - CBSE Class 7 Maths Activity 10A