MATLAB Answers

triangle

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WONG SIAN
WONG SIAN on 19 Feb 2011
A figure shows a triangle defined by the vertex coordinates (x1 ,y1 ) ,(x2 ,y2 ) , and (x3 ,y3 ). What command will interactively prompt a user for x and y coordinates at each of the triangle vertices. then how about draw the triangle and label it vertices. Next is compute and print the area of the triangle and its perimeter.
My solution is like this, please check for me ya...
x1=input('x1=');
y1=input('y1=');
x2=input('x2=');
y2=input('y2=');
x3=input('x3=');
y3=input('y3=');
v1=[x1 y1];
v2=[x2 y2];
v3=[x3 y3];
a=sqrt((x1-x2)^2+(y1-y2)^2);
b=sqrt((x2-x3)^2+(y2-y3)^2);
c=sqrt((x3-x1)^2+(y3-y1)^2);
if a > 0 & b > 0 & c > 0 & (a + b > c) & (a + c > b) & (b + c > a)
s=(a+b+c)/2;
Area=sqrt(a*(s-a)*(s-b)*(s-c))
Perimeter=a+b+c
plot([x1 x2 x3 x1],[y1 y2 y3 y1])
title('Triangle')
xlabel('x axis')
ylabel('y axis')
text(x1,y1,sprintf('(%d,%d)',x1,y1))
text(x2,y2,sprintf('(%d,%d)',x2,y2))
text(x3,y3,sprintf('(%d,%d)',x3,y3))
else
disp('Not a triangle, please reinsert')
end

Answers (2)

Walter Roberson
Walter Roberson on 19 Feb 2011
Please return to your previous question on this topic and edit the additional information in to that, and delete this duplicate question.

Matt Fig
Matt Fig on 19 Feb 2011
Another vote to update your topic and don't forget to DELETE this topic!

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