১.এটা শংকুত থকা শীৰ্ষবিন্দুৰ সংখ্যা কিমান ?
Answers
Given : A cone
এটা শংকুত
To Find : Number of vertices
শীৰ্ষবিন্দুৰ সংখ্যা
Solution:
A cone tapers smoothly from a flat circular base to a point called vertex .
Hence a cone has one vertex
Number of vertices = 1
শীৰ্ষবিন্দুৰ সংখ্যা = 1
Volume of cone = (1/3)πr²h
Surface area of cone = πrl + πr²
where l is slant height = √(h² + r²)
h = height of cone and r = radius of the base of cone
lateral / curved surface area of cone = πrl
base area = πr²
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