Answer:
Below!
Step-by-step explanation:
First, find the area of the two triangle using the formula A= bh/2
A = 10 x 12 / 2
= 120 /2
= 60 cm^2 each triangle
Now find the area of the two side areas using the formula A = bh
A = 3 x 13
= 39 cm^2 each
Find the area of the base strip using A = LW
A = 10 x 3
= 30
Finally you need to add up all the areas to get the surface area
SA = 60(2) + 39(2) + 30
= 120 + 78 + 30
= 228 cm^2
Hope this helps, good luck!
