F3 mathematics chp4

1. In a scale drawing, 2cm represents 50m. The scale used is

• 1:25

• 1:100

• 1:2500

• 1:10000

The diagram is drawn on a grid of equal squares.

Which of the rectangles A, B, C and D, is a scale drawing

of the shaded rectangle.

• A

• B

• C

• D

In the diagram, equilateral triangle Q is the scale drawing

of equilateral triangle P.

State the scale used.

• 1:2

• 1:3

• 60

• 600

• A. 12

• B. 96

• C. 768

• D. 1152

Determine the scale used for each scale drawing

below in the form 1:n .

• 1:3

• 1:4

Solve each of the following.

Find the actual length of RS, in cm.

• RS=1cm

• RS=4cm

• RS=2cm

• RS=3

Give the actual length of the wall clock is 27cm.

Find the scale used to draw the wall clock.

• 1:4

• 1:3

• 1:6

(a)Determine the scale used.

• 1:2

• 1:4

(b)Calculate the length, in cm, of SU.

• 29

• 58