Question

In the figure below, R is between Q and S, and S is between R and T. If RT=7, QS=6, and QT=9, find RS.

RS =
R
0
S
T
X

Answer 1

RS = 4

Explanation:

from the diagram

QR + RT = QT , that is

QR + 7 = 9 ( subtract 7 from both sides )

QR = 2

and

QR + RS = QS , that is

2 + RS = 6 ( subtract 2 from both sides )

RS = 4