Important Concepts and Formulas
1. Perpendicular distance between two
parallel lines at every point remains the same.
2. There can be many lines parallel to a
given line.
3. From a given point, one and only one
line can be drawn parallel to a given line.
4. A unique triangle can be constructed
if
·
its
three sides are known.
·
the
lengths of any two sides and the measure of the included angle are known.
·
the
measures of two angles and the length of the side including them are known.
·
the
length of one leg and the hypotenuse of a right-angled triangle are known.
To see the construction of different types of triangles ----- Click Here!
To see the construction of different types of triangles ----- Click Here!