In ⊙ O, draw chord AB equal to r. Draw chord AC equal to Vt (which is the side of a regular decagon). CB is now one side of the regular pentadecagon.

The arrival of these hesperornithids in more southern waters during the early Campanian may indicate a cooler climate, closer shores, adaptations to changes in prey, or other factors.

The bacteriologist adjusted the focussing knob on the microscope.

With my love's picture then my eye doth feast.