Question

how we can know how to find c.s.a or t.s.a of the 3d figure in maths ​

Answer 1

Answer:

C.S.A is the product of its base perimeter and height.

T.S.A is the sum of the C.S.A and the areas of its top and base.

Step-by-step explanation:

Example if there is a room the four sites are considered as lateral surface area and the four sides along with top and bottom are considered as total surface area

Answer 2

Step-by-step explanation:

The curved surface area of a hemisphere(CSA) = ½ (curved surface area of a sphere) = ½ (4 π r2) = 2 π r2 , where "r" is the radius of the hemisphere. The total surface area of a hemisphere(TSA) = curved surface area + Base Area = 2 π r2 + π r2 = 3 π r2 , where "r" is the radius of the hemisphere