求翻译一下这句话!速度!

问题描述:

求翻译一下这句话!速度!
a rectangular room is 8 by 7 m , a triangular rug with AB=2.5m and BC=3m is placed on the floor . what is the area of the floor not covered by the rug?
翻译 !快!

一个长方形的房间是8x7米,一个三角形地毯是放在地板上,AB=2.5米,BC=3米.那么没有被地毯覆盖的地板面积有多少?