TI
TIL
302 ml
Ê
R
-A
to m
2.12 dam to m
(b) 4 mm 12 cm to cm
(d) 15 km 78 dam to km
(f) 36 hm 12 dm 4 mm to m
am 12 dm to m
to
Answers
Answer:
Conceptual understanding / Model Problem / Model Example /
Activities
l Circle : A circle is a closed plane figure whose every point lies at an equal
distance (radius) from a fixed point (center).
l A rubber ball, Globe, tennis ball, shotput are all examples of solids circular in
shape, called spheres.
l Sphere : A sphere is a three dimensional figure, which is made up of all points
in the space, which is at a constant distance from a fixed point. This fixed point
is called centre.
Instructions :
1. Refer page 235 and 237 for understanding the surface area of sphere and
volume of the sphere.
2. Surface area of sphere = 4Sr
2
, Where r is the radius of sphere
Volume of sphere = xSr
3
, Where r is the radius of sphere
Step-by-step explanation:
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