Find a math problem, find the relationship between s 1 s2 s3 s4 and give the reason.
According to a theorem of triangle area (forgotten), the ratio of the areas of two triangles with the same height is equal to the ratio of their base lengths.
S 1: S4 = A0: OC (formula 1)
S3: S2 = oc: ao (Category 2)
Then multiply the first formula by the second formula to get the conclusion you want! ! !