Question

Please solve it fast.

Answer 1

since it is the theorm that line joining the mid-points has area that is 1/4 of the triangle area

so area of triangle (second last smallest)

1/4*area of smallest=1/4*100=25cm^2

area of third smallest

1*4*second smallest=1/4*25=6.25

now the area of the last triangle

1/4*6.25=1.5625cm^2