 ## Question

secondary 3 | A Maths

Anyone can contribute an answer, even non-tutors.

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anyone can help me by showing me the steps to get the answer? ASAP thanks!! :)

Date Posted: 4 months ago
Views: 34
Eric Nicholas K
4 months ago
The only way is to find the length of all the lines by the staight-line "Pythagoras Theorem" length formula.
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4 months ago
I still dont understandd
Eric Nicholas K
4 months ago
We use the formula for the length of a straight line, which is the square root of

(x2 - x1)^2 + (y2 - y1)^2

to find the length of the straight line joining two points together.

The above formula is actually a more general expression of the Pythagoras Theorem, since x2 - x1 represents the “horizontal” distance between both points and y2 - y1 represents the “vertical” distance between both points.
Eric Nicholas K
4 months ago
We have to do so over the three sets of coordinate pairs.

Length of AB is the square root of

(xB - xA)^2 + (yB - yA)^2.

Length of BC is the square root of
(xC - xB)^2 + (yC - yB)^2.

Length of CA is the square root of
(xA - xC)^2 + (yA - yC)^2.

Add these three values for the perimeter of the triangle.
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4 months ago
thanks!! :) 