How do you find the area of a circle in terms of pi?

Mathematics

2 answers:

Kaylis [27]2 years ago

7 0

A=πr2? Im not really sure though.

LiRa [457]2 years ago

7 0

πr^2 will find the area of a circle

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What should be added to a²-2ab+b² to get a²-ab-2b²

dybincka [34]

SOLUTION:

what should be added to a²-2ab+b² to get a²-ab-2b²

let the added no is P

$\pmb{P+(a^2-2ab+b^2)=(a^2-ab-2b^2) }$

$\pmb{P=(a^2-ab-2b^2)-(a^2-2ab+b^2) }$

$\pmb{P=a^2-ab-2b^2-a^2+2ab-b^2 }$

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2 years ago

I need to know what r equals ?

kifflom [539]

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2 years ago

Find AD. Show how you got your answer.

stealth61 [152]

Notice the picture below
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18 and 18 degrees each half

notice the tickmarks, the triangle is an isosceles,
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down below with the base

now, the base is 8, AD is bisecting that too, to 4 and 4

now, using the Law of Sines

$\bf \textit{Law of sines}
\\ \quad \\
\cfrac{sin(\measuredangle A)}{a}=\cfrac{sin(\measuredangle B)}{b}=\cfrac{sin(\measuredangle C)}{c}\\\\
----------------------------\\\\
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Ilia_Sergeevich [38]

Below are suppose the be the questions:

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b. graph the parabola 
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