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Iteru [2.4K]
3 years ago
8

Please explain how to do this

Mathematics
1 answer:
user100 [1]3 years ago
7 0

Answer:

Option 4

Step-by-step explanation:

Area of a circle (A) = πr²-------------(i)

Circumference (C) = 2πr

=>C = 2πr

=> 2πr= C

=> π = C/2r

Substituting the value of π = C/2r in the first equation i.e (i)

A = (C×r²)/2r

= (C . r)/2

= 1/2 × C × r

Therefore, option 4 is the correct option

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Consider the quadratic equations
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The higher the value of c, father apart the two equations will be.
They will touch when the difference, i.e. y1(x)-y2(x)=x^2-4*x+c has a discriminant of 0.
This happens when D=((-4)^2-4c)=0, or when c=4.
(a)
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(b) 
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(c) 
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It will be more obvious if you plot the two curves in a graphics calculator using c=3,4, and 5.


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3 years ago
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Vlad1618 [11]
The circumcenter of a triangle is the point in the plane equidistant from the three vertices of the triangle. so I believe it is A. True..
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Answer:

Step-by-step explanation:

in a parallelogram diagonals bisect each other.

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