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Find the surface area

Find the surface area-example-1
User Frollo
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Answer:

Explanation:

3. the diagram has 3 rectangles, 2 triangles

the surface area is the area of each shape

for the first rectangle = length x breadth = 8 x 6 = 48

for the second rectangle = length x breath = 6 x 6 = 36

for the third rectangle = length x breath = 6 x 6 = 36

for the triangles

(base x height )/2 = (8 x 4.5) /2 = 4 x 4.5 = 18

Surface Area = 48 + 18 + 36 + 36 = 138

4. there are 4 identical rectangles and a base rectangle

4 x (5 x3 ) + ( 5 x5) = 4 x 15 + 25 = 60 + 25 = 85 ft

5. there are 2 triangles of 6 x 8 and a rectangle of 10 x 8

surface area = 2 x( (base x height)/2) + 10x8

2 x ((6 x8) /2 ) + 80 = 2 x (48/2) + 80 = 48 + 80 = 128ft

User Rozumir
by
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