Answer:
See explaination
Step-by-step explanation:
All these questions can be solved remembering that the area of a triangle is the base*height/2
1) 9.8*3.6/2 = 17.64
2) 14*35/2 = 245
3) 8.4*6.9/2 = 28.98
4) For this one, it is important to realize that if a triangle contains 2 perpendicular lines, it is a right triangle, and therefore, those two lines must be the base and the height. So the answer is just 1.8*2.5/2 = 2.25
5)3.2*9.6/2 = 15.36
