You make a right cylinder. Select a plane which is inclined to the axis of the cylinder and use this plane (and one parallel to it), to make the bases.
they are made from no.2
not a clue!
A shield volcano is broad with gently sloping sides.
A inclined plane with two sloping sides is a duquesne incline.
The sloping sides of a fold are called limbs. They represent the inclined surfaces that connect the crest (top) and trough (bottom) of the fold.
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The handle of a key is a simple lever. The sloping sides of the teeth on a cylinder-lock key ('Yale' type) act as wedges to lift the internallocking pins.
They both have a sloping side. A wedge has 2 sloping sides, but an inclined plane has only1.
A Triangular Pyramid
shield volcano
no. they have gently sloping sides.
Five: four sloping sides and a square base foundation