To solve this problelm you must apply the proccedure shown below:
1. You must apply the formula for calculate the area of a triangle, which is:
![Area=((base)(height))/(2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/6acg5hh9tkjcoim71wvipra8qrdrh0oh7l.png)
2. Now, substitute the values given in the problelm above into the equation:
![Area=((6units)(7units))/(2) \\ Area=21units^(2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/jnpwoaukocjc2xygos6yziq4o5xjhhwqrc.png)
Therefore, as you can see, the answer is:
![21units^(2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/2sy5zaqgxmpl767rudp7l66lhk9x7yc9sx.png)