Answer:
CD ≅ CD, Reflexive property
Step-by-step explanation:
We want to show the triangles are similar by SAS. We've already proven that one pair of their sides are congruent (AC ≅ BD), and that one pair of their angles are congruent (∠CDE ≅ ∠DCE), so we need to show that the next pair of sides are congruent.
The measure of QS from the given line is 10
<h3>Addition postulate</h3>
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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You add 3 2/7. 7/1-3 5/7= 3 2/7