Can you me on this it is hard

288 square centimeters

Step-by-step explanation:

The surface area is the area of all the surfaces of the prism.

There is

Top Triangle

Bottom Triangle

Front Rectangle

Side Rectangle

Another Side Rectangle

Note:

Area of Triangle = 0.5 * base * height

Area of Rectangle = base * height

Lets find each area and add them up.

Top Triangle = 0.5 * 9 * 12 = 54

Bottom Triangle = 0.5 * 9 * 12 = 54

Front Rectangle = 15 * 5 = 75

Right Rectangle = 12 * 5 = 60

Left Rectangle = 9 * 5 = 45

Total Surface Area = 54 + 54 + 75 + 60 + 45 = 288 square centimeters

go and ask your mom to you