the curve. Then a circle drawn through the points ABD will pass through the pole O ; since the angles OAD , OBE (the supôÙpleôÙment of OBD ), are equal. The point O may
Table of Contents
CHAPTER XI THE LOGARITHMIC SPIRAL
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the curve. Then a circle drawn through the points ABD will pass through the pole O ; since the angles OAD , OBE (the supôÙpleôÙment of OBD ), are equal. The point O may