1. PLANE GEOMETRY
CREATED BY
P .K. BHATTACHARYA

2. DIFFERENT FIGURES OF GEOMETRICAL SHAPES

3. TRIANGLE FEATURES- Three vertex,three sides and three angles.
Six parts.
Three line segments.
Sum of angles in a triangle must be 1800.

4. Formation of triangle Two sides and included angle
Perimeter of the triangle and two base angle.
Right angle triangle.
Three medians .
Two angles and one side
Altitude or height and base.
Difference of sides and one base angle.
Addition of sides and angle.

5. Types of triangle ACCORDING TO SIDE Equilateral triangle.
Isosceles triangle.
Scalene triangle.
ACCORDING TO ANGLE-
Right angle triangle.
Obtuse angle triangle.
Acute angle triangle.

6. CALCULATION FOR AREA Three sides of a,b,c are given as per unit.2
Area = s(s-a)(s-b)(s-c)
Area= (1/2)Base x Altitude or Height
S =

7. SOLID SHAPES
Cuboid and Cube

8. AREA AND VOLUME Area(Total surface Area)=2 (lxb+bh+lh)
Area(Cube)=6 x Side2
Volume=LxBxH
Volume= l3

9. QUADRILATERAL FEATURES- Four sides and four angles. Four vertex.
Four line segments.

10. PARALLELOGRAM,RHOMBUS,SQUARE ANDRECTANGLE .

11. AREA OF QUADRILATERAL Area of rectangle=L X B Area of square=(Side)2
Area of Rhombus = ½ x d1 x d2
Area of parallelogram = ½ x d1 x d2
Area of quadrilateral = Sum of the area of two triangles.
Area of Trapezium = ½(Sum of the parallel two sides) x height

12. APPLICATION In science, Engineering/ technology. In mathematics.
Aerospace engg.
Launching of satellite.
Construction and design.

13. ACKNOWLEDGEMENT
As per C.B.S.E.pattern.
N.C.E.R.T. Books.