Answer: 258 square centimeters.
Step-by-step explanation: First, we need to find the area of the square, which you multiply the length and width. 12 is the length and width for the square and if you multiply them, you get 144, which is part of your answer. Now, we need to find the area of the two triangles, which can be found by multiplying the base and height and divide it in half. 19 is the height and 6 is the base (because the triangle's base is half of the square's width on the image). After you multiply them, you get 114, but you need to cut it in half. However, you won't need to, because you have another triangle that has the same base and height, so the area of the two triangles together can stay 114. Originally, if we cut 114 in half for both triangles, we would've gotten 57 for both and if we added them, it would be 114. Add 114 and 144, and you get 258 square centimeters.
Let me know if this is right! :)