1. Geometric Representations 1.8 AS91033 3 Credits
Constructions

2. Constructions I can read a scale
Learning objectives
17/01/2019
I can read a scale
I can find the real lengths from scale drawings
I can construct scale drawings

3. Reading a scale
1 : 10
1 : 200
1: 50
1 : 20
1: 1000 1:
1 cm on the map 10 cm in real life
1 cm on the map 200 cm in real life
1 cm on the map 50 cm in real life
1 cm on the map20 cm in real life
1 cm on the map 1000 cm in real life
1 cm on the map cm (1km) in real life

4. ÷ 50000
= 20 cm
50000 x 8
= cm =4km
÷ 25000
= 8 cm
25000 x 22=
cm = 5.5km ÷
= 50 cm
x 12 =
cm = 12km
2 : 20
2 :
1 :
5 : cm:km
5 : cm
1 :

5. Reading scales
130 ÷ 50 = 2.6
180 ÷ 50 = 3.6
120 ÷ 50 = 2.4
350 ÷ 50 = 7
40 ÷ 50 = 0.8
50 ÷ 50 = 1
320 ÷ 50 = 6.4

6. main hall width
18cm cm = 18 m
Ladies toilet
width
5cm cm = 5 m
length
4cm cm = 4m

7. Success Criteria I can read a scale
I can find the real lengths from scale drawings
I can construct scale drawings
10 ticks level 5 pack 3 page 9-11
10 Ticks level 6 pack 2 page 33-36
10 Ticks level 6 pack 8 page 31-32
MEP 14.2