513,738 views
40 votes
40 votes
AMNP ~ AQRP N x + 8 28 M 24 P 3x - 9 R Create a proportion and find the length of side PR*

User McBeth
by
2.1k points

1 Answer

30 votes
30 votes

Using thales theorem:


\begin{gathered} (24)/(28)=(x+8)/(3x-9) \\ 24(3x-9)=28(x+8) \\ 72x-216=28x+224 \\ 44x=440 \\ x=(440)/(44) \\ x=10 \\ PR=3(10)-9=21 \end{gathered}

User Gurneet Sethi
by
3.2k points