A segment of a sphere or ellipsoid, a cone, a segment of a paraboloid or hyperboloid, a segment of a torus etc.
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They are both 2 dimensional curved shapes
A cylinder or a cone. Or a hemisphere.
a pyramid and a cone are alike because they both have a flat side on the bottom and they can slide. they are different because a pyramid has 5 flat sides on the sides and 1 flat side on the bottom part. a cone can roll but a pyramid can't roll like the cone.
A concave mirror is a spherical mirror with a reflective inside surface. When the reflective surface is made more curved, the distance between the focal point and the surface increases. A concave mirror can form both virtual or real images.
Yes, to both.Yes, to both.Yes, to both.Yes, to both.