In right-angled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle. EUCLID SideSquareSubtendTriangle
If produced indefinitely, meet on that side on which the angles are less than two right angles. EUCLID IndefinitelyLessOtherSideTwo
Give him threepence, since he must make a gain out of what he learns. EUCLID GiveLearnMakeMustOutSinceThreepence