Question

determine whether a tangent line to the circle is shown in the diagram.

Answer 1

hint : tangent and radius intersect at 90 degrees

Answer 2

So, if OAB is a right triangle, then AB is a tangent

Answer 3

knw how to check whether OAB is a right triangle or not ?

Answer 4

my teacher said i was wrong.......

Answer 5

you have attached same pic two times
i see the same question in both pics ?

Answer 6

again, this attachment doesnt match with the original problem :/

Answer 7

-_- embarassed face

Answer 8

you're right about the conclusion that it is not a tangent

Answer 9

but you're wrong in saying that the angle is LESS THAN 90

Answer 10

a^2 + b^2 < c^2

gives an obtuse triangle, so the angle will be greater than 90

Answer 11

would

since the square of the length of the longest side of a triangle is greater than the sum of the squares of the lengths of the other two sides, then the triangle is obtuse. for it to be a tangent it must form a right triangle with the circle.

be accepted as an answer?

Answer 12

looks good !b