2 triangles with a base of 8 and height of 6 divide the base and height in half to get the Base and height of 1 triangle and then use 1/2 B•H to find the area of one triangle 1/2 (4•3) = 6
That’s an acute triangle since all angles seem less then 90 degrees
I'm going to say that the answer is $12 for 24 roses