2A rectangular prism has six faces why might you have to find the surface for only 3 of hose faces: because the other 3 are the same so u just have to times the other ones by two.
4you times all sides by each other then you add the results
6 to find the area of this triangle 9.1x4.5/2=20.475x2=40.95
3x9.1=27.3
6.4x3=19.2x2=38.4
If you add all the answers together you will get the surface are of your triangle
8 for a you just count all the faces and for b you 180x60=10800cm=108m/2x2=108
1.1mx2.4m=2.64x2=5.28
1.8x2.4=4.32
then you add all of the answers together and you get your answer
Where is Mr.Harbeck
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