find the area of right traingle of base 1.2m and hypotenuse 3.7.

Answer 1

Since we are given the hypotenuse and one leg, we can find the other leg using Pythagoras theorem.
The area is then the product of the two legs divided by two.
Height (of the other leg)
=√(3.7²-1.2²)=3.5
Base (given)=1.2 m
So you have all information to find the area of the right triangle with legs 1.2 and 3.5m.

Answer 2

2.1m square