A cikin wannan ɗaba'ar, za mu yi la'akari da menene kusurwar dama, jera manyan siffofi na geometric da ke faruwa a ciki, da kuma nazarin misali na matsala akan wannan batu.
Ma'anar kusurwar dama
Angle shine kai tsayeidan yayi daidai da 90 digiri.
A cikin zane-zane, ba a yi amfani da baka mai zagaye don nuna irin wannan kusurwa ba, amma murabba'i.
Madaidaicin kusurwa shine rabin madaidaiciyar kusurwa (180°) kuma a cikin radians daidai yake da Π / 2.
Siffai tare da kusurwoyi daidai
1. Square - rhombus, duk kusurwoyi daidai da 90 °.
2. Rectangle – madaidaicin layi, duk sasanninta ma daidai ne.
3. Kusurwoyin dama yana daya daga cikin kusurwoyinsa na dama.
4. Trapezoid rectangular - aƙalla ɗaya daga cikin kusurwoyi shine 90 °.
Misalin matsala
An san cewa a cikin triangle ɗaya daga cikin kusurwoyi daidai ne, kuma sauran biyun suna daidai da juna. Bari mu nemo ƙimar da ba a san su ba.
Magani
Kamar yadda muka sani daga , yana daidai da 180 °.
Saboda haka, kusurwoyi biyu da ba a san su ba suna lissafin 90 °