u = 0.3cm;

beginfig(1);

pair A, B, C, D, O;
O=(0,0)*u; B=(4.35,0)*u; C=(-8.25,-3.3)*u; 
D=(-6,0)*u; 
A=(6.25,2.5)*u;

draw A--B withpen pencircle scaled 1.5pt;
draw C--D withpen pencircle scaled 1.5pt;
draw (-7,0)*u--(6,0)*u withpen pencircle scaled 1.5pt; 
draw (-9,-3.6)*u--(7,2.8)*u withpen pencircle scaled 1.5pt;

label.top("A",A);
label.bot("C",C);
label.bot("B",B);
label.top("O",O);
label.top("D",D);

endfig;
end