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lesantik [10]
3 years ago
10

Explain why you can use πr2 to find the area of the base of a cone

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
8 0
The base of a cone is a circle.

The area of a circle is \pi r^2.

Thus, the area of the base of a cone \pi r^2.

The derivation of the formula for the area of a circle involves a bit of calculus, but if you'd like, I can walk you through it.
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A tangent from point P to a circle of radius 4 cm is 10 cm long. Find: <br>a the distance of P from the centre of the circle <br
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Answer:

see explanation

Step-by-step explanation:

a

The tangent and the radius at the point of contact form a right angle

Using Pythagoras' identity on the right triangle formed.

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b

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3 years ago
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To solve this problem, let us say that:

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Step-by-step explanation:

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