###### Exercise 20

Find the area of a triangular flag with a base of \({2.9\ {\rm m}}\) and a height of \({130\ {\rm cm}}\text{.}\)

Its area is .

Find the area of a triangular flag with a base of \({2.9\ {\rm m}}\) and a height of \({130\ {\rm cm}}\text{.}\)

Its area is .