Isahani imaze gushyirwa ku isahani, uburyo bwo gushushanya Inguni no kugenda Inguni yimodoka ntishobora kugira ingaruka.
Icyapa cyimbere cyashyizwe kumurongo wimbere wikinyabiziga 2. Isahani yisahani yashyizwe kumasahani yimbere igomba kuba perpendicular cyangwa hafi ya perpendikulari nindege ndende ya simmetrie yikinyabiziga, hagati yicyapa cyimbere ntigomba kuba kuri uruhande rwibumoso rwindege ndende yuburinganire bwikinyabiziga, kandi icyapa cyimbere hamwe nicyapa cyapa ntigishobora kurenga iburyo bwiburyo bwimbere yikinyabiziga.
Isahani yashyizwe ku isahani yimbere igomba kuba itandukanijwe nindege itambitse, kandi isahani yimbere ntishobora kwemererwa gusubira inyuma kurenza iyo
15 ° icyapa cyinyuma kigomba kuba kumpera yinyuma yikinyabiziga. Icyapa cyapa cyashyizwe ku cyapa cyinyuma kigomba kuba perpendicular cyangwa hafi ya perpendicular ku ndege ndende yo guhuza ibinyabiziga kandi igomba kuba iburyo bwindege ndende ndende yerekana ikinyabiziga. Icyapa cyinyuma ninyuma yicyapa ntigishobora kurenga ibumoso bwimbere yikinyabiziga. Iyo uburebure bwuruhande rwo hejuru rwisahani yinyuma hejuru yubutaka burenze 1,2m, uburebure bwuruhande rwimbere rwicyapa cyinyuma munsi yubutaka burenze 30 °.
15 °
