Write these dimensions in words

Pg 18 Ex 3

1 Each tube is over ten metres above ground. (T)

2 The tubes are made of glass and steel. (T)

3 A heliostat contains mirrors . (F)

4 Each light tube contains a plastic pipe. (F)

5 Light can only travel down the tubes. (T)

Pg 19 Ex 1

Write these dimensions in words .

1. 45.805 cm - forty-five point eight hundred and five centimetres

2. 27'3" – twenty seven foot three inches

3. 7,643 sq yd – seven point six four three square yard

4. 17 cm x 13 cm – seventeen centimetres by thirteen centimetres

5. 15' ± " – fiveteen foot plus or minus three fourth inches

6. 0.045 cm – zero points oh four fivev centimetres

7. 1,267 m² – one point two six seven square metres

Pg 19 Ex 3

A: The client thinks that the room is too dark.

B: No isn't. Why don't we install more lights? .

A: we Well, he wants natural lighting.

B: I see. How will be if I make the windows bigger?

A But the walls aren't strong enough ...

B: That's a good one . I know ... why would use light tubes?

A: Light tubes?

B: Yes. They come in kits. We'll can to cut a hole in the roof first. I think the diameter is about 40 cm. The tube goes from the roof, through the attic and comes out in the ceiling. At the top there's a semi - spherical glass dome which collects the sunlight. This light is reflected down the tube . And at the bottom there's a ceiling-mounted unit which transfers the sunlight into the room.

A: That makes Lighter. But aren't they expensive?

B: Not really. Around $300,1 think . They should take around half a day t o install.

A: I'm sure he'll be OK with tube .

B: OK. I'll call the office and ask them to produce a proper contract

Pg 19 Ex 4

a cylinder - a circle; a rectangle

a cube - a rectangle; a square

a rectangular prism - a rectangle

a sphere - а circular

a cone – a triangular, а circular

Pg 19 Ex 5

Simple – complex

1 permanent (doimiy) – temporary (vaqtinchalik)

2 final (tugatish) – start (boshlash)

3 subtract (ayirish) – add (qo'shish)

4 different (turli) – similar (o'xshash)

5 hardware – software

6 loss (yo'qotish) – find (topish)