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 | Protractor ndi chida chomwe chimagwiritsidwa ntchito kuyeza ngodya. |
| Mwina munawagwiritsa ntchito m’kalasi la masamu. |
| Ma angles amayesedwa mu madigiri. Mu bwalo lathunthu madigiri 360. |
| Ma protractor ambiri ali ndi mawonekedwe ozungulira opangidwa ndi pulasitiki… |
| ... ndipo imatha kuyeza mpaka madigiri 180. |
| Komabe, ndizotheka kugula ma protractor omwe amafika madigiri a 360. |
| Pakukula, ma protractor atha kupezeka ngati gawo la zida zingapo, kuphatikiza: |
| - Magawo a square ophatikizidwa
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| - Protractors ndi kuya kwake
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| - Digital protractors (ndi goniometers)
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