At Y and Z repeat the procedure with the angle 45° (90° - 45° = 45°).
KuY noZ phinda isenzeko ngembombo yamashumi amane anesihlane amanqanaba (Amashumi alithoba amanqanaba uthabathe amashumi amane anesihlanu amanqanaba, ushiyekelwa ngamashumi amane anesihlanu amanqanaba).