Question

The areas of two similar triangles are 64 cm² and 100 cm² respectively. If a median of the smaller triangle is 5.6 cm, find the corresponding median of the other. 

Answer 1

Let the two triangles be ABC and PQR with medians AM and PN, respectively. 

 Therefore, the ratio of areas of two similar triangles will be equal to the ratio of squares of their corresponding medians. 

∴ `(ar(ΔABC))/(ar(ΔPQR))=(AM^2)/(PN^2)` 

⇒ `64/100=5.6^2/(PN^2` 

⇒ `PN^2=64/100xx5.6^2` 

⇒ `PN^2= sqrt(100/64xx5.6xx5.6)` 

= 7 cm
Hence, the median of the larger triangle is 7 cm.