A triangular wheat field is 180 meters long at the bottom and 130 meters high, with a total yield of 2340 kg. What is the yield per hectare of this wheat field?

A triangular wheat field is 180 meters long at the bottom and 130 meters high, with a total yield of 2340 kg. What is the yield per hectare of this wheat field?

First, calculate the triangle area
S = ah △ 2 = 180 × 130 △ 2 = 11700 (M2)
Then convert:
11700 △ 10000 = 1.17 HA or 11700 M2 = 1.17 ha
The final calculation is as follows
2340 △ 1.17 = 2000 (kg)
A: the yield of this wheat field is 2000 kg per hectare

If the three sides of a triangle wheat field are 9m, 12m and 15m respectively, the area of this wheat field is______ ㎡．

∵ 92 + 122 = 152, ∵ three triangles with lengths of 9m, 12m and 15m form a right triangle, of which the right side is 9m and 12M, ∵ the area of the triangle is 12 × 9 × 12 = 54m2

If the side length of a triangle wheat field is 15m, 25m and 20m, the area of this wheat field is
Urgent, urgent

Because 15 square + 20 square = 25 square, so this is a right triangle
Therefore, area = 15 * 20 / 2 = 150 square meters