Step-by-step explanation:
Side of S .= 12cm
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Step-by-step explanation:
Side of S .= 12cm
alt. of T.= 18 cm
&
area of tr. = area of s.
1/2×b×h= s^2
1/2× b× 64= (40)^ 2
b = 160×2/64
b= 5cm