Mathematics, 30.11.2019 08:31 xxsyd21

What's the area and circumference of this circle?
50 points

What's the area and circumference of this circle? 50 points

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Answer from: QueenNerdy889

If I was you I would get the 2 points and find your slope then you use the circle formula with the value of pie... 2pie r^2 then you solve it a the are you "multiply " the slope with your new # answer.

Answer from: isaiaspineda09pe6ljq

The circumference of a circle is the length of the line around the edge of the circle. A circle's circumference, c, is equal to twice its radius, r, times π. This can be expressed as the following equation:

c = 2πr

Since π is 3.14, this can also be written as c = 6.28r

To calculate circumference, then, you multiply the circle's radius by 6.28. Take a circle with a radius of 4 inches. Multiplying the radius by 6.28 give you 25.12. So the circle's circumference is 25.12 inches.

You can calculate the area of a circle using the circle's radius. The area of a circle is equal to π times the radius squared. Remember that any number squared is equal to that number multiplied by itself. So area, A can be found using this equation:

A = πr^2 or A = π x r x r

For example if you're trying to calculate the area of a circle with a radius of 3 inches. You'd multiply 3 times 3 to get 9, and multiply 9 times π. Remember that π is equal to 3.14. Also note that when you multiply inches by inches, you get square inches, which is a measurement of area instead of length.

A = π x 3 ins x 3 ins A = 3.14 x 9 sq ins A = 28.26 sq ins

So the circle has an area of 28.26 square inches.

I did not copy and paste this, I hope it's helpful!

Answer from: Quest

Intersecting secant-tangent theorem states that if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.so to break it down: 1. pq acts as the tangent and ps as the secant with an intersection at p.sr = 21rp = 3x + 3pq = 4x + 4following to equation: tangent squared = the two segments multiplied by each otherso (4x + 4) ^ 2 = (3x + 3) • (21) simplifies to 16x^2 - 31x - 47 = 0 or (16x - 47)(x + 1) x = -1 or x = 47/162. pq acts as the tangent and ps as the secant with an intersection at p (again! )sr = 16rp = xpq = 15(15) ^ 2 = 16 • x225 = 16xx = 225/163. the interesting chords are proportional to each other so a ratio is possible to set up: ap dp 10 3 + x = = —— = pc pb 8 xcross multiple to get 10x = (3 + x)(8)x = 12

Answer from: Quest

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

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What's the area and circumference of this circle?
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