Question

What Is The Length Of RT?

Answer 1

B

Explanation:

AS is an angle bisector, thus the ratio of the sides of the triangle is equal to the ratio of the corresponding parts of RT, that is

`(SR)/(ST)` =
`(RA)/(TA)`, substituting values

`(7.5)/(9)` =
`(3.5)/(x)` ( cross- multiply )

7.5x = 31.5 ( divide both sides by 7.5 )

x = 4.2

Thus

RT = 3.5 + x = 3.5 + 4.2 = 7.7 → B