Find this by looking at the corresponding parts on the other triangle. They have the same marking on them. Make sure that when answering for segments or triangles that the order is the same on both sides.
Supposing all were child tickets: 145x$5=$725 $1153-$725=$428 (diff. between above price and original price) $9-$5=$4 (diff. between adult price and child price) $428÷$4=107 (no. of adult tickets)
