Assertion: mirror's surface | /r/HasProperty | convex
Facets:
value: with mirrors
type: OTHER
Source sentences:
text: Their surface was either concave or convex, and imperfections tended to distort the image.
text: With mirrors, the curved surface is referred to as either concave or convex depending upon whether the center of curvature occurs on the side of the reflecting surface or the opposite side.