The surface area of the prism is: 120 m²
What is the surface area of the prism?
To find the surface area of the prism, we will find the areas of each face and add them up. Thus:
Formula for area of a triangle is:
A = ¹/₂bh
Where:
A is Area
b is base
h is height
Area of a rectangle is:
Area = Length * Width
Thus:
TSA = 2(¹/₂ * 3 * 4) + (9 * 5) + (9 * 3) + (4 * 9)
TSA = 12 + 45 + 27 + 36
TSA = 120 m²