Question

 true or false 

1, If Ox and Oy are opposite rays then \(\widehat{xOy=180^o}\)

2,If Ox and Oy are parallel then \(\widehat{xOy}=180^o\) or \(\widehat{xOy}=0^o\)

3, If \(\widehat{xOy}=90^o\) then \(\widehat{xOy}\) is a straight angle

4, If \(\widehat{xOy}\) +\(\widehat{yOz}=180^o\) then \(\widehat{xOy}\) and \(\widehat{yOz}\) are complementary

5, If \(\widehat{xOy}\) is larger than \(\widehat{xOz}\) then \(\widehat{xOz}\) is an acute angle

6, the lagest angle which is form by two rays is an obtuse angle

7, Two acute angles cannot be supplementary

8,\(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent

9, if \(\widehat{xOy}\) and \(\widehat{zOy}\)are supplementary then one of them must be an obtuse angle

10,if \(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent then \(\widehat{xOy}\) > \(\widehat{xOz}\)

11, If Ox lies between Oy and Oz then \(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent

Answer 1

1: T

2: F

3: F

4: T

5: F

6: F

7: T

8: T

9: F

10: F

11: F