The area of a triangle is half the multiplication of the base and the height.
So, if the smaller triangle has height 6 cm and base 2 cm, its are is
![(6* 2)/(2)=6](https://img.qammunity.org/2020/formulas/mathematics/high-school/bte0r43oftyr1rme0vundutkao836sf94n.png)
Similarly, if the height of the larger triangle is 9 cm, and its base is 3 cm, its area is
![(9* 3)/(2)=(27)/(2)](https://img.qammunity.org/2020/formulas/mathematics/high-school/42s1nwd48ji3nc7eib9cdjkduvr9qjfa9f.png)
So, the total area is
![6+(27)/(2) = (12)/(2)+(27)/(2)=(39)/(2)](https://img.qammunity.org/2020/formulas/mathematics/high-school/k92rumv2d1sqh69oopqolnkjv69dygs7ha.png)