Trisecting an angle correctly up to arcminute - Joseph Tonien We present a simple compass-and-straightedge construction method of approximately trisecting an angle. This method is applicable to both acute and obtuse angles. With an original angle α, the construction gives an angle τ with error |ε| = |τ - α/3| < .0155˚. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education
