Pahee
Answered

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Can someone just explain the formula for the surface area of a 3-D rectangle (I do not know the official name)? Please explain it step by step.

Sagot :

Answer:

rectangular prism Area = 2L(W) + 2L(H) + 2W(H)

Step-by-step explanation:

Step 1 recognise the shape and unit ie) inches. cm etc.

Rectangular prism is like a cube but the length or height etc is disproportionate and therefore rectangular.and not cubic. even though its measured in cubic for volume and squared for surface area, it is added together each side square to allow for coverage.

Step 2

Count the sides you should automatically know how many sides for area

Full surface Area = how many sides

= 6

We then realise there is symmetry so we can multiply in pairs.

For spheres we multiply in 4;s Surface area = 4 π r2

Step 3

Know we have pairs how mnay pairs = 3

2L(w) + 2 L(h) + 2 W(h) = Surface area of rectangular prism

Show the multiplication and seperate with + sign

Step 4 Then add them all up and show unit square ^2 at end.

201184315

Answer:

SA=2lw+2lh+2hw

Step-by-step explanation:

To find the surface area of a cuboid or a rectangular prism, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

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