12. The three altitudes intersect at a
single point ,called the orthocenter
of the triangle.
The orthocenter lies inside the
triangle if and only if the triangle
is acute.
13. Median: The median of a triangle is a line from a vertex to
the midpoint of the opposite side.
14. Interior angles: The three angles on the
inside of the triangle at each vertex.
Exterior angles: An exterior angle of
the triangle is equal to sum of two
opposite interior angles of the triangle.
ANGLE SUM PROPERTY
A triangle is that the sum of all interior
angles of a triangle is equal to 180*.
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32. One cannot succeed alone no matter how great one’s abilities are,
without the cooperation of others. This project, too, is a result of
efforts of many. I would like to thank all those who helped me in
making this project a success. I would like to express my deep
gratitude to my Math's teacher, who was taking keen interest in
our activities and I really appreciate and acknowledge her pain
taking efforts in this Endeavour.
