Protractor
No protractor to hand? Print one, check the size with a ruler, and cut it out.
The protractor
Quick: choose and print. Advanced: the names of angles and the inner scale explained.
- Print at «Actual size» / 100 %.
- Check with a ruler: the long line at the bottom must be 16 cm.
- Cut it out, and preferably glue it onto cardboard or laminated plastic.
- Place the centre point on the vertex of the angle and the zero line along one arm.
In depth: more numbers and “what if”
The names of angles
| Angle | Name |
|---|---|
| 0° – 90° | acute angle |
| 90° | right angle (90°) |
| 90° – 180° | obtuse angle |
| 180° | straight angle |
| 180° – 360° | reflex angle |
The half protractor has two scales: the outer counts from the right, the inner from the left. The two numbers at the same mark always add up to 180°.
More: Printable templates
- Printable paperSquared paper, graph paper, isometric paper and dot paper in A4.
- Coordinate systemAn empty coordinate system with the axes you choose — ready to print.
- Number lineA number line from any number — whole numbers, decimals or fractions.
- Times tableThe small and the large table to print — and a practice track with your record.
- Hundred squareThe numbers from 1 to 100 — filled in, blank or with a times table coloured in.
- Clock and timeSet the clock, and print worksheets with clocks to read or draw.
- Printable rulerRulers at 1:1 and scale rulers at 1:20, 1:50 and 1:100 — and read a measurement on the drawing.
- Formula sheetThe most important formulas for area, volume, percentages and triangles on one sheet.