Question

Bases of a cylinder are
A. Squares
B. Rectangles
C. Circles
D. None of these

Answer 1

Hint:In geometry, a three-dimensional shape can be defined as a figure or an object that has three dimensions : length, width and height. Unlike two-dimensional shapes, three-dimensional shapes have thickness or depth. A solid object with two identical flat ends that are circular and one curved side is called a cylinder. It has the same cross-section from one end to the other. The bases are always congruent and parallel to each other.

Complete answer:
In geometry, a shape or a figure that has a length and a breadth is a 2D shape. In other words, a plane object that has only length and breadth is 2 dimensional. Straight or curved lines make up the sides of this shape. Also, these figures can have any number of sides.

In general, plane figures made of lines are known as polygons. Rectangle, circle, square, triangle, quadrilateral and pentagon are some examples of 2D shapes. Some of the 2d shapes contain sides and corners, whereas some have curved boundaries.

Nets for building 3-D shape: A net is a two-dimensional representation of a three-dimensional figure that is unfolded along its edges. It represents each face of the figure in two dimensions.

In other words, a net is a pattern made when the surface of a three-dimensional figure is laid out. Thus showing each face of the figure. A solid may have different nets.

Therefore from the above given figure we can observe here that the bases of the cylinder are circles.

Note: Here in the given question they have asked us about the bases of a cylinder, we can also find the bases of other 3d figures like cuboids. We can also find the curved surface area \[CSA = 2\pi rh\], total surface area \[TSA = 2\pi r\left( {r + h} \right)\], volume \[V = \pi {r^2}h\] of cylinder using respective formulas.