5. SEGMENT
Part of a line made up of 2 points and
all the points of the line between the
2 points
• •
D E
DE represents a segment
6. RAY
Part of a line consisting of one
endpoint and all the points of the line
on one side of the endpoint
F • •G
FG represents a ray
7. POLYG
ON
A simple closed figures by
joining three or more line
segments is called polygon
8. TRIANG
LE formed by joining
It is a closed figure
three line segments . So , a triangle is a
polygon .
The three line segments which form the
triangle are called its sides .
9. CIRCLE
A closed curve formed in such a way
that any point on this curve is
equidistant from a fixed point
which is in the interior of the curve.
10. QUADRILATE
RAL
It is a closed figure formed by joining four
line segments called quadrilateral. So
quadrilateral is a polygon. Different
shapes of quadrilateral are shown below:
The four line segments which form a
quadrilateral are called its sides.
11. PARALLELO
GRAM
A parallelogram is a quadrilateral with opposite sides
parallel (and therefore opposite angles equal). A
quadrilateral with equal sides is called a rhombus,
and a parallelogram whose angles are all
right angles is called a rectangle. And, since a
square is a degenerate case of a rectangle, both
squares and rectangles are special types of
parallelograms.
12. RECTANGLE
The rectangle, like the square, is one
of the most commonly
known quadrilaterals. It is defined
as having all four interior angles 90°
(right angles).
13. SQUARE
The square is probably the best known of
the quadrilaterals. It is defined as having all sides
equal, and its interior angles all right angles (90°).
From this it follows that the opposite sides are
also parallel.
• A square is simply a specific case of a regular
polygon, in this case with 4 sides. All the facts
and properties described for regular polygons
apply to a square.
14. RHOMB
US
A rhombus is actually just a special type
of parallelogram. Recall that in a parallelogram
each pair of opposite sides are equal in length.
With a rhombus, all four sides are the same
length. It therefore has all the properties of a
parallelogram.
15. TRAPEZI
UM
A trapezium is defined by the properties it
does not have. It has no parallel sides.
Any quadrilateral drawn at random
would probably be a trapezium. Since it
has no interesting properties beyond
those of a quadrilateral, it is not used
much in geometry.
16. KITE
A kite is a member of
the quadrilateral family, and while easy
to understand visually, is a little tricky to
define in precise mathematical terms. It
has two pairs of equal sides. Each pair
must be adjacent sides
