2. What are the shapes and dimensions of the cross sections that result from a slice perpendicular to the base, through the center, and a slice parallel to the base of a cylinder with a radius of 15 cm and a height of 19 cm?

A machinist needs to lay out three holes in a plate. Find, to the nearest thousandth millimeter, the length of side b in the figure.

A slot is machined in a circular plate with a 41.36-millimeter diameter. Two milling cuts, one 6.30 millimeters deep and the other 3.15 millimeters, are made. A grinding operation then removes 0.40 millimeter. What is the distance from the center of the plate to the bottom of the slot? All dimensions are in millimeters.

Does a rectangle have a an incenter? b a circumcenter?