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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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Find x.______________a0
velikii [3]

Answer:

x=4

Step-by-step explanation:

Before we find x, we need to set up this triangle a little more. We need to find the triangle's altitude before we can solve for x. We will use the heartbeat method to find the altitude.

Let altitude = y; solve for y:

\frac{2}{y}=\frac{y}{6}

y^2=12

y=\sqrt{12}

y=2\sqrt{3}

Now that we know the altitude, we can use the Pythagorean Theorem to find the hypotenuse (x).

a^2+b^2=c^2

2^2+(2\sqrt{3})^2=c^2

4+12=c^2

c^2=16

c=4

Since c and x are the same; c is just the hypotenuse in the Pythagorean Theorem.

x=4

4 0
3 years ago
What is the measure of angle B, m
gladu [14]

Answer:

70 degrees

Opposite angles are equal to each other

7 0
2 years ago
The table represents the start of the division of 8x^4+2x^3-7x^2+3x-2 by the indicated divisor. Find the quotient.
Viktor [21]
Answer: <span>2x² + x - 2 (the first option)</span>
4 0
3 years ago
How, do you divide big numbers.
Triss [41]

Answer:

hope this helps!   :)

Step-by-step explanation:

Partition the primary number of the profit (or the two first numbers if the past advance took another digit) by the principal digit of the divisor. Compose the consequence of this division in the space of the remainder. Increase the digit of the remainder by the divisor, compose the outcome underneath the profit and deduct it

7 0
3 years ago
Read 2 more answers
If you could just refresh me on how to do this, thanks.
Masteriza [31]
I'm pretty sure it's D
8 0
3 years ago
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