1. There are______trees between the classroom and the playground.
2. The______trees line the passage from the entrance.
3. Many______trees are along the side of the playground.
In a row of trees, a tree is 7th from the left end and 14th from the right end. How many trees are there in the row?
Two trees A and B are on the same side of a river. From a point C in the river, the distance of trees A and B are 250 m and 300 m respectively. If ∠C=45∘, find the distance between the trees (Use √2 = 144.)