<PRE><B>Question 1045752</B>
{{{drawing(300,300,   -30,30,-1,12,  
circle(24,0,0.4),
circle(-24,0,0.4),
circle (0, 10,0.4),
line(24,0,0,10),
line(-24,0,0,10),
line(0,0,0,10),
line(-24,0,24,0)
locate (-30, 5, &quot;h&quot;))}}}Triangle
Area = 1/2 of the base X the height
A = 1/2 bh
345 = (1/2)50b  (In cm)
345cm^2/25cm =b
 13.8cm = base
CHECKING
(1/2)50cm*13.8cm = 345cm^2 CHECKS!


</PRE>