Question

Pls help me...Circles A and B have radii 5 and 7, respectively, and the distance between their centers A and B is 6. If the two circles intersect at points M and N, find the length of the common chord MN.

Answer 1

For ALL geometry questions you MUST make a drawing. Have you done that already?

Answer 2

Something like this, preferable on paper with a pencil

Answer 3

yup im done...

Answer 4

Hm wait a moment, I will make a drawing on paper, this doesnt help me so much

Answer 5

is x = 1?

Answer 6

i mean h =2 sqrt 6...

Answer 7

so MN = 4 sqrt 6?

Answer 8

I dont know yet. But I would prefer if you posted your way of solving it instead of just posting numbers

Answer 9

Yes answer is 4sqrt6

Answer 10

equate area of triangle 1/2*h*6=area by herons formula

Answer 11

ok thank you so much...i must only use the pythagorean theorem..right?

Answer 12

This is possible since common chord is always perpendicular to the line joining centres of a circle and is bisected by it.

Answer 13

yep...but at first it seems impossible since the distance of the 2 centers is 6 yet the radii are 5 and 7...

Answer 14

how to apply heron's formula here MayankD?

Answer 15

Yea the figure is somewhat like

Answer 16

yep dts ryt..

Answer 17

Area of a triangle=sqrt(s*(s-a)*(s-b)*(s-c)) where s is semi perimeter of triangle and a b and c are the sides of the traingle

Answer 18

Yes I have \[4\sqrt{6}\]
as well.

Answer 19

Please help me... Suppose f(t)=A*2^(0.02t) represents the bacteria in a culture t minutes from the start of an experiment. Give an expression for the number of minutes needed for the bacteria to double.HW BWT DS??

Answer 20

F(t)=A*2^(0.02(t+50))

Answer 21

d answer here is 50ln2

but i dont know the solution

Answer 22

What is the exact question?