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Neáu thì tia Ox naèm giöõa hai tia Oy ; Oz .

Hoûi moãi phaùt bieåu sau ñuùng hay sai ?. 1/. Neáu thì tia Ox naèm giöõa hai tia Oy ; Oz. Ñ. S. 2/. Hai goùc coù chung moät caïnh goïi laø hai goùc keà nhau. Ñ. S. 3/. Hai goùc phuï nhau laø hai goùc coù toång soá ño baèng 90. Ñ. S. 4/.

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Neáu thì tia Ox naèm giöõa hai tia Oy ; Oz .

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  1. Hoûi moãi phaùt bieåu sau ñuùng hay sai ? 1/ Neáu thì tia Ox naèm giöõa hai tia Oy ; Oz . Ñ S 2/ Hai goùc coù chung moät caïnh goïi laø hai goùc keà nhau. Ñ S 3/ Hai goùc phuï nhau laø hai goùc coù toång soá ño baèng 90 . Ñ S 4/ Hai goùc buø nhau thì toång soá ño cuûa chuùng baèng 180 . Ñ S Hai goùc coù toång soá ño baèng 180 laø hai goùc keà buø . 5/ Ñ S 6/ Hai goùc keà buø thì coù toång soá ño baèng 180 . Ñ S

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