school project........

4.  Born
22 December 1887
Erode, Madras Presidency, British Raj(nowTamil Nadu, India)
 Died
 26 April 1920 (aged 32)
Kumbakonam, Madras Presidency,British Raj (nowTamil
Nadu, India)
 Residence
 Kumbakonam, Madras Presidency
Madras, Madras Presidency
London, United Kingdom
 Nationality
 Indian
 Fields
 Mathematics
 Institutions
 Trinity College, Cambridge
 Alma mater
 Government Arts College (no degree)
Pachaiyappa's College (no degree)
Trinity College, Cambridge (BSc, 1916)
 Thesis
 Highly Composite Numbers (1916)

6.  Born
 476 CE
Kusumapura (Pataliputra) (present day Patna[1]
 Died
 550 CE
 Residence
 India
 Religion
 Hinduism
 Academic background
 Influences
 Surya Siddhanta
 Academic work
 Era
 Gupta era
 Main interests
 Mathematics, astronomy
 Notable works
 Āryabhaṭīya, Arya-siddhanta
 Notable ideas
 Explanation of lunar eclipse andsolar eclipse, rotation of Earth on its axis, reflection of light by
moon,sinusoidal functions, solution of single variable quadratic equation,value of π correct to 4
decimal places, circumference of Earth to 99.8% accuracy, calculation of the length of sidereal year
 Influenced
 Lalla, Bhaskara I, Brahmagupta,Varahamihira


7. TYPE OF

8. Types of
Quadrilaterals
• A closed plane figure bounded
by four straight lines is called a
quadrilateral.
• A quadrilateral has four
vertices.
• The line segments joining the
opposite vertices are called its
diagonals.
• A quadrilateral has 4 angles.
The sum of its interior angles is
360 ⁰.
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9. • Parallelogram:
If the line segments in each pair
of opposite
sides of a quadrilateral are
parallel, then the
quadrilateral is called a
parallelogram.
• Rhombus:
If all the sides of a parallelogram
are congruent,
then it is called a rhombus.
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10. • Rectangle:
If all the angles of a parallelogram are right
angles,
then the quadrilateral is called a rectangle.
• Square:
If all the sides of a rectangle are congruent,
then it is
called a square.
• Trapezium:
If in a quadrilateral, line segments in one pair of
opposite side are parallel and the opposite
sides in the
other pair are not parallel, then the
quadrilateral is
called a trapezium.
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11. Special Kinds of
Quadrilaterals-kite
• If in a quadrilateral,
two pairs of
adjacent sides are
equal, then it is
called a kite.
• The diagonals of a
kite are not equal
but intersect each
other at right
angles.
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12. You have learnt
• A closed plane figure bounded by four straight lines is called a
quadrilateral.
• The sum of the interior angles of a quadrilateral is 360 ⁰.
• If both pairs of opposite sides of a quadrilateral are parallel, then the
quadrilateral is a parallelogram.
• If in a parallelogram, all sides are equal, then it is called a rhombus.
• If in a parallelogram, one of the angles is a right angle, then it is called a
rectangle.
• If in a parallelogram, one of the angles is a right angle and all sided are
equal,
then it is called a square. 12