set hand drawn shapes, circle, square, star, triangle, line
如图$1$,$ riangle abc$内接于$odot o$,点$d$是$overset{frown}
写出$ riangle abc_百
a form-finding instrument for reciprocal structures
area of triangle
set hand drawn shapes, circle, square, star, triangle, line
如图$1$,$ riangle abc$内接于$odot o$,点$d$是$overset{frown}
写出$ riangle abc_百
a form-finding instrument for reciprocal structures
area of triangle