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Allan, This is still not enough information to determine the height of the triangle. In my diagram M is the midpoint of the base PQ. I then drew a semicircle with center M and radius 2.4/2 = 1.2 meters. If you take any point on the semicircle, for example B in my diagram, the the triangle BPQ has an angle of 90 degrees at B. This is a theorem of Euclid. If the point you choose on the semicircle is C, half way around, then the height of the triangle CPQ is 1.2 meters. You could however chose the point on the semicircle to be A, very close to P, and then the height would be very close to zero. The point B on the semicircle can be anywhere between A and C so the height of your triangle could be any number between 0 and 1.2 meters. I hope this helps,  


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