Q and P

Here, angles are \(\angle AOB,\angle BOC\) and \(\angle AOC\).

We know that, the shortest distance between two points is called a line segment. The line segment joining two points A and B is denoted by \(\bar {AB}\) or \(\bar {BA}\). The line segment in the given figure are as follows:
(i)\(\bar {AB}\) (or \(\bar {BA}\) ) (ii) \(\bar {AC}\) (or \(\bar {CA}\))
Yes, from the figure, it is clear that point A is the end point of each line segment.

Five situations of a point in our daily life are as follow:
(i) Tip of an ice cone.
(ii) An edge of a table.
(iii) Corner of a room.
(iv) Corner of a desk.
(v) Corner of a paper.

The line segments are\(\bar { AB}\) and \(\bar { AC}\).
Yes, A is the end point of each line segment.

A curve, which does not cut itself is called open curve.

ABCD is a polygon, where interior is shaded as given below:

The curve given below is a closed curve, since its ends are joined:

The curve given below is an open curve, since its ends are not joined:

From the given figure,
(a) Five points are B, C, D, E and O.
(b) A line is \(\vec {BD}\) (or \(\vec {OB}\)).
(c) Four rays are \(\vec {OB}\), \(\vec {OC}\), \(\vec {OE}\) and \(\vec {OD}\).
(d) Five line segments in the given figure are \(\overline { OB } ,\overline { OC } ,\overline { OE } ,\overline { OD } \) and \(\overline { DE } \).

Seven sides i.e AB, BC, CD, DE, EF, FG, AG.

We know that, if a closed simple figure is made up entirely of line segments, then it is called a polygon.
(i) Polygon with five matchsticks.

(ii) Polygon with four matchstick

(iii) Polygon with three matchsticks

(iv) We know that, a polygon is a closed plane figure, bounded by line segments. So, with the help of two matchsticks, it is not possible to make a closed plane figure. Hence, no polygon is formed by two matchsticks.