Because ae=ec, the area of ade is equal to the area of cde.
Because bd=cd X 2, the area of abd is twice that of acd.
Therefore, the area of aed is one sixth of the whole triangle area.
2. Because the length and width are given in this question, the condition that "768 square bricks with a side length of 0.15m are needed to pave the floor" is deceptive.
4.8*3.6/(0.2*0.2)
= 17.28/0.04
=432 (block)
3. It can be considered that if the depth of the pond is125m, the part soaked twice is 0. The topic is 66, which means that the depth of the reservoir is more than half of 33 cm, so 250÷2+66÷2= 158 (cm) = 1.58 (m).
The water depth of this pond is 1.58 meters.
Or (250-66)/2+66 =158cm =1.58m.
not bad
Let the depth of the pond be x (cm) (x-66)+(x-66)+66 = 250x =158 (cm).
How to solve a problem? Yes ~?