As shown in Figure 10, AD / / BC, ad = 5 cm, the area of triangle abd is 10 square cm, what is the height of ad side of triangle ACD

As shown in Figure 10, AD / / BC, ad = 5 cm, the area of triangle abd is 10 square cm, what is the height of ad side of triangle ACD

∵AD∥BC
The heights of △ abd and △ ACD in AD are equal
The height is: 10 × 2 △ 5 = 4cm