Which of the following would similar triangles and trigonometry be useful for measuring?

a. the length of a table
b. the width of a wide river
c. the length of a car
d. the width of the classroom

"The width of a wide river" is the one among the following choices given in the question for which similar triangles and trigonometry would be useful for measuring. The correct option among all the options that are given in the question is the second option or option "B". I hope that the answer has helped you.

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2