



 
Hi Kameron, Can you check the wording of the question? I don't understand "if 10 inch". What does the ten inches measure? Penny
Hi Kameron, I drew a diagram (not to scale). $P$ is the center of the circle and $DE$ is perpendicular to $$PB.$ $h = DE$ is the height of the trapezoid and it's also the height of the triangle $DPB$ with base $PB.$ The area $A$ of the triangle $DPB$ is given by \[A = \frac12 PB \times h = 5 h.\] If you could find the area of the triangle $DPB$ a different way then you would have $A = 5 h$ and you could solve for $h.$ Can you find the area of the triangle $DPB?$ Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 