A model of a ship is made to a scale of 1 : 250. Find :

(i) the length of the ship, if the length of its model is 1.2 m.

(ii) the area of the deck of the ship, if the area of the deck of its model is 1.6 m².

(iii) the volume of its model, when the volume of the ship is 1 cubic kilometer.

A model of a ship is made to a scale of 1 : 200.

(i) If the length of the model is 4 m, calculate the length of the ship.

(ii) If the area of the deck of the ship is 160000 m², find the area of the deck of the model.

(iii) If the volume of the model is 200 litres, calculate the volume of the ship in cubic metres.

All regular polygons having the same number of …………… are similar.

1. sides

2. angles

3. diagonals

4. centric

Two circles are always :

1. congruent

2. similar

3. enlarged

4. concentric