Question

In the figure R is between Q and S and S is between R and T . If RT = 15 , RS = 7 , and QT = 18 , find QS

Answer 1

The measure of QS from the given line is 10

Addition postulate

From the given diagram below, we will use the following addition postulate;

QR + RS + ST =QT

Given the following parameters

RT = 15

RS = 7 , and

QT = 18

Substitute

QR + RT =QT

QR + 15 = 18

QR = 18 - 15

QR =3

Determine QS

QS = QR + RS

QS = 3 + 7

QS = 10

Hence the measure of QS from the given line is 10

Learn more on addition postulate here: brainly.com/question/2134445

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