a) Các góc kề nhau : \(\left(\widehat{xOz};\widehat{mOz}\right);\left(\widehat{mOy};\widehat{mOz}\right);\left(\widehat{mOy};\widehat{yOn}\right);\left(\widehat{nOx};\widehat{yOn}\right)\)
b) Các cặp góc kề bù : \(\left(\widehat{xOz};\widehat{yOz}\right);\left(\widehat{mOy};\widehat{yOn}\right);\left(\widehat{nOx};\widehat{yOn}\right)\)
c) Các góc vuông : \(\widehat{mOz};\widehat{zOn}\)
d) Các góc đối đỉnh : \(\widehat{xOn}=\widehat{mOy};\widehat{mOx}=\widehat{yOn}\)