Answer:
Answers below.
Step-by-step explanation:
Area of a triangle is base * height /2
1) 120 * 90 / 2 = 5,400 square meters
2) 24 * 18 / 2 = 216 square cm
3) 12 * 9 / 2 = 54 square cm
4) 2.4 * 1.8 / 2 = 2.15 square cm
5) 6 * 4.5 / 2 = 13.5 square cm
