Lesson 3 of 3
Measuring and simple calculations
Reading a tape, checking level and working out quantities.
4 min +10 points
Reading a measuring tape
Most tapes show feet and inches on one side and centimetres and millimetres on the other. 1 foot = 12 inches. 1 metre = 100 centimetres. Hook the tape end firmly and keep it straight.
Level and square
- A spirit level shows if a surface is flat: the bubble should be in the middle.
- For a square corner, use the 3-4-5 rule: mark 3 on one side, 4 on the other; the line between them should be 5.
Simple area
Area of a floor = length × width. A room 12 feet long and 10 feet wide is 120 square feet. Add a little extra for cutting and waste when you order tiles.
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Get 2 of 3 right to finish this lesson.