Thus, if two sides of a sides of a triangle are equal, the angles opposite the sides are equal; and the converse is true, i
A proposition in which, after a conclusion from something supposed has been drawn, the order is inverted, making the conclusion the supposition or premises, what was first supposed becoming now the conclusion or inference
Of a proposition or theorem of the form "If A is true, then B is true" or (equivalently) "All Xs are Ys", the proposition or law "If B is true, then A is true" or "All Ys are Xs", respectively