Ma Protractors ndi Kupanga ndi Kupereka kwa Semicircular
Kufotokozera Kwachidule:
Chonyamulira ma angles a 180°/360°. Kapangidwe kowonekera bwino kokhala ndi ma graduation osindikizidwa. Chonde titumizireni uthenga wokhudza MOQ, mtengo, wothandizira ndi nkhani zina zokhudzana ndi mgwirizano.