Question 10 Is the ff. argument valid? O Not valid O Maybe O Yes, it is valid

For what values of c is c(1,2,3)=1?

Which of the following statements would you prove by the indirect method? a If ACAB in ABC, then mBmC. b If AC=AB in ABC, then mB=mC. c If RSTV is not a square, then RSST. d An angle has exactly one bisector.

Give counterexamples for the following statements. If and are irrational, then is irrational. If and are irrational, then is irrational.