Step-by-step explanation: first, you have to find the area of one triangle. The formula is A=bh1/2 . When you do that, you get 14. 14 is only one triangle, so multiply it by 4 and you get your answer, 56.
A=1/2BH i took one triangle and divided the 4 by 2 because its a triangle then multiplied the product of that by 3.5, 2x3.5 and got 7 there are 4 triangles so you multiply 7 by 4 and get 28
