9.2.1 Scale Drawings, PT3 Focus Practice


Question 1:
Diagram below shows polygon P drawn on a grid of equal squares with sides of 1 unit.

On the grid in the answer space, redraw polygon P using the scale 1 :  1 2 .
The grid has equal squares with sides of 1 unit.

Answer:




Question 2:
Diagram below shows polygon W drawn on a grid of equal squares with sides of 1 unit.

On the grid in the answer space, redraw polygon W using the scale 1 : 2.
The grid has equal squares with sides of 1 unit.

Answer:



Question 3:
Diagram below shows a polygon PQRSTU.



(a) If the polygon is redrawn using the scale 1 : 400, calculate the length of PQ.
(b) In the answer space, redraw the polygon using the scale 1 : 400. The grid has equal squares with sides of 1 cm.

Answer:
(a)

Length of PQ= 4800 cm 400  =12 cm

(b)




Question 4:
Diagram below shows a polygon.



On the grid in the answer space, redraw the polygon using the scale 1 : 500. The grid has equal squares with sides of 1 cm.

Answer:

Actual length Drawing
45 m = 4500 cm 4500 ÷ 500 = 9 cm
20 m = 2000 cm 2000 ÷ 500 = 4 cm
35 m = 3500 cm 3500 ÷ 500 = 7 cm
10 m = 1000 cm 1000 ÷ 500 = 2 cm





Question 5:
Diagram below shows a polygon.


(a) If the polygon is redrawn using the scale 1 : 300, calculate the length, in cm, the drawing for the side 24 m.
(b) In the answer space, redraw the polygon using the scale 1 : 300. The grid has equal squares with sides of 1 cm.

Answer:
(a)
Length of side of the drawing = 2400 cm 300 =8 cm

(b)



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