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Hai góc AOy và BOx là hai góc đối đỉnh nên A O y ^ = B O x ^ .
Ta có B O x ^ ≤ B O C ^ nên A O y ^ ≤ 60 ° ; dấu “=” xảy ra khi tia Ox trùng với tia OC.
Vậy số đo lớn nhất của góc AOy là bằng 60 0 khi tia Ox trùng với tia OC
Mk làm câu 1 nha!
Ta có hình vẽ:
Ta có:
xOy + yOx' = 1800
350 + yOx' = 1800
yOx' = 1800 - 350
yOx' = 1450
xOy và x'Oy' là 2 góc đối đỉnh nên xOy = x'Oy' = 350
xOy' và yOx' là 2 góc đối đỉnh nên xOy' = yOx' = 1450
^^ Học tốt!!!
treuyrht5tttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
moy cau nay de nhung minh khong biet ve hinh tren may tinh
Vẽ hình này khó lắm nhưng nếu bạn suy nghĩ thêm 1 xíu là ra ngay thui , cố lên ^^