Asymptote: Example 1

Asymptote (Vector Graphics Language)

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size(200); 
import olympiad; 

//definitions 
pair A=origin, B=(4,0), C=(4,2), D=(0,2), E=(2,2); 
path p1=(A--C); 
path p2=(E--B); 

//draw 
draw(A--B--C--D--cycle); 
draw(p1); 
draw(p2); 
dot((A)); 
dot((B)); 
dot((C)); 
dot((D)); 
dot((E)); 
dot((IP(p1,p2))); 

//label 
label("A",A,SW); 
label("B",B,SE); 
label("C",C,NE); 
label("D",D,NW); 
label("E",E,N); 
label("F", IP(p1,p2),S);

For definitions, see Olympiad Package Part 1: Value Setting.

For drawing, see Drawing.

For labeling, see Labeling.