Anonymous

# Need help on finding the length of a line :)?

Can anyone explain how i can find the lengths of 2 Lines.

There is a line with A at one side, M is the middle value, And C is on the other end of the line.

The co-ordinates

A is (1,1),

M is (2,3)

C is (3,5)

I need to find the lengths of the line MC and also MB

Update:

But the Pythagorus Theorem is a^2 + b^2 = c^2

But i cant do this as i do not have any length

Update 2:

oops i forgot to put the co-ordinates of B on :) they are (-2, 5)

Relevance

Length of MC is square root of 2 squared plus 2 squared

Length of MA is square root of 1 squared plus 2 squared

• MC = sqrt((5-3)^2+(3-2)^2) = sqrt(4+1) = sqrt(5)

There is no B given so its pretty hard to find MB

Since M is the midpoint, MA is also sqrt(5)

AC = 2sqrt(5)

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3

3^2+4^2=5^2

use the distance formula for mc and mb

• Make right triangles and use the Pythagorean Theorem.

• the distance formula is the pythagorean theorem in disguise.

Distance formula = sqrt[(x2 - x1)^2 + (y2 - y1)^2]

now just use this formula to solve your problem:

where, (1,1) = (x1, y1) and (3,5) = (y2, y1)

• Anonymous