Question

Select the counterexample to this conjecture:
A pair of supplementary angles includes one obtuse angle.
A.90º + 90º = 180º B.120º + 60º = 180º C.100º + 80º = 180º D.110º + 70º = 180º

Answer 1

What is an obtuse angle? If you use the definition, you should be all set.

Answer 2

an obtuse angel is an angel bewtween 90 and 180 degrees

Answer 3

An obtuse angle is an angle strictly larger than 90 and strictly less than 180 degrees. Use that definition, now.

Answer 4

so it would be 120+60 which would equal 180 right

Answer 5

pick the only one that doesn't have an obtuse angle.

Answer 6

would it be A

Answer 7

yes.

Answer 8

There you go

Answer 9

thankyou

Answer 10

You're welcome.