Answer:
both triangles area:
4.2 x 8.2 = 34.44
you don’t need to divide by two cause there’s two triangles anyways.
also, you get 8.2 by subtracting the total length by the top length. (13.5-5.3)
rectangle:
4.2 x 5.3 = 22.26
the total area is 56.7cm squared
1.2. If you divide 9.6 by 8, you get 9.6. To check take 8x1.2=9.6.
Three sides, because if you make a clean cut the surface of the cut is a triangle.
Answer:
0.4375
Step-by-step explanation: calculator