Answer:
10
Step-by-step explanation:
QT=ST/2=√(12^2+16^2)/2=10
40,20,10
3. 640÷2=320, 360÷2=160, 160÷2=80 and so on
Answer: No Triangle: 30 , 85 , 60, and 2, 8, 10
One Triangle: 7, 24, 25
Many Triangles: 45, 45, 90 5, 15, 160