"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…
Illustration of a how to construct a square equivalent to the sum of two given squares.
Illustration of a how to construct a square equivalent to the difference of two given squares.
Illustration used to show how to bisect a straight line.
Illustration used to show how "to construct a tangent to a circle from a point outside."
Pattern that can be cut out and folded to construct a regular tetrahedron. Fold on the dotted lines,…
A thin flat slab of fired clay used for roofing
Illustration showing ambiguous case when the solution is not a triangle using law of sines.
Triangle construction when given two angles and the included side.
Development of a triangular pyramid.
Plan and elevation of a triangular pyramid.
Projections and development of a truncated cylinder.