Robin is designing a target with centre `O`.
The diameter of the smallest circle is 36 cm.
Robin makes `AC = 1 1/4 xx AB` and `BC = 1/2 xx CD`.
What is the diameter of the whole target, `XD`?
| cm |
Geometry, NAP-A4-CA25
A traffic light is 2.4 m tall. Its shadow from a nearby floodlight is 3 m long.
What is the height of the floodlight?
| `text(3.6 m)` | `text(3.8 m)` | `text(4.0 m)` | `text(4.2 m)` |
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Show Worked Solution
`text(Triangles are similar,)`
`text(S)text(ince similar triangles have sides in)`
`text(similar ratios:)`
| `h/5` | `= 2.4/3` |
| `:. h` | `= (5 xx 2.4)/3` |
| `= 4\ text(metres)` |
Geometry, NAP-F4-NC32 SA
Trapeziums `ABCD` and `AEFG` are similar.
What is the distance from `E` to `F`?
| metres |