The document discusses methods for calculating the total surface area of different 3D geometric shapes like cuboids, cylinders, spheres, and hemispheres. It provides formulas for finding the total, lateral, and curved surface areas of cuboids. Similarly, it lists the formulas used to calculate the surface areas of cylinders, spheres, and hemispheres by considering the surface areas of various circular sections.

1. Presented by:
k.Subhashini
9 -A

3. 3
2
1 a
a
a 


4. 2
6a
a)
6(a
a)
(a
a)
(a
a)
(a
a)
(a
a)
(a
a)
(a
















5. 2
2
2
2
2
4
)
a
a
(
6a
-
:
area
remaining
So
reduced.
is
bottom
and
top
of
area
The
.
6a
cube
of
area
surface
l
that tota
know
We
a





6. 3
a
a
a
a





7. CUBOID :- A three-dimensional
geometric figure formed of six
rectangular plane faces, each
set at right angles to the four
sides adjacent to it.

8. FINDING TOTAL SURFACE AREA OF
CUBOID:-
)
2(
)
(
2
)
(
2
)
(
2
)
(
)
(
)
(
)
(
)
(
)
(
hl
bh
lb
l
h
h
b
b
l
l
h
h
b
b
l
l
h
h
b
b
l






















9. FINDING LATERAL SURFACE AREA OF
CUBOID :-
h
b
l
h
b
h
l
h
b
h
b
h
l
h
l
)
(
2
)
(
)
(
2
)
(
)
(
)
(
)
(















10. FINDING VOLUME OF CUBOID:-
h
b
l 



12. rh
2
h
r
2
Cylinder
of
area
surface
curved
So
r
2
r
radius
with
circle
of
perimeter
know
We








13. )
(
2
2
2
cuboid
of
area
surface
Total
2
circles
two
of
Area
2
cuboid
of
area
surface
Curved
2
2
h
r
r
r
rh
r
rh













14. h
r
h
r
2
2






16. .
2
2
1
rl
r
l







17. )
(
Area
Surface
Total
Area
Surface
Curved
circle
of
Area 2
r
l
r
rl
r








18. h
r
h
r
2
2
3
1
3
1







20. 2
4
sphere
of
area
surface
So
circle
a
of
area
the
times
4
sphere
of
area
Surface
r




21. 3
3
3
4
3
4
r
r






23. 2
2
2
r
2
circle
area
the
twice
hemisphere
of
area
surface
Curved
r







24. 2
2
3
r
3
circle
area
the
Thrice
Hemisphere
of
area
surface
Total
r







25. 2
2
3
2
3
2
r
r




