Question

In the figure below, S is between Q and T, R is the midpoint of QS. If QT=10 and RS=2 find ST

Answer 1

ST = 6

Explanation:

The segment sum is ...

QR +RS +ST = QT

QR +2 +ST = 10 . . . . use given values

Since R is the midpoint of QS, we know QR = RS = 2. Now, we have ...

ST = 10 -2 -QR = 10 -2 -2 = 6

The length of ST is 6.