A math problem about similarity The shadow of a big tree falls on the wall and the ground respectively. At the same time, the shadow length of a 1m high benchmark is 0.5m. At this time, the shadow length of a big tree falling on the ground is 3M and that on the wall is 2m. The height of a big tree can be calculated

A math problem about similarity The shadow of a big tree falls on the wall and the ground respectively. At the same time, the shadow length of a 1m high benchmark is 0.5m. At this time, the shadow length of a big tree falling on the ground is 3M and that on the wall is 2m. The height of a big tree can be calculated

The shadow length of 1 m high benchmark is 0.5 m, which means that the shadow length is half of the benchmark
Therefore, when the shadow of the big tree on the ground is 3 meters, the corresponding big tree is 6 meters, plus 2 meters parallel to the wall. The height of the big tree is 6 + 2 = 8 meters
Countable ratio:
Let the part of the tree on the ground be x meters
X:3=1：0.5