New Elements of Geometry

ABCD agreeably area equals half area equals one-fourth area equals one-half area equals three-fourths arithmetical calculation bases and equal breadth circum circumference is four circumference is three contained in ABFG cumference DBCE demonstrations diagonal diagram diame diameter is four eight equal equal bases equal heights equal rectangles equal triangles equals the area equals the circumference equals the diameter equilateral triangle extension ference four equal geometrical quantity geometrical unit geometry half the arc half the diameter hypothenuse infinitely infinitely divisible inscribed circle inscribed sphere length line of circumference linear edge lines drawn mathematics measure mixed mathematics multiplied numbers octahedron one-third parallelogram perfect cube perfect square perpendicular plane figure Prop proposition Pythagoras radius rectangle ABFG regular hexagon regular octagon regular pentagon right angle severally equal solid figures solidity equals square root straight line surface tetrahedron thickness triangle ABC triangle equals whole circumference