Answer:
Step-by-step 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
