PLANE GEOMETRY CREATED BY

DIFFERENT FIGURES OF GEOMETRICAL SHAPES

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

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.

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

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

SOLID SHAPES  Cuboid and Cube

AREA AND VOLUME  Area(Total surface Area)=2 (lxb+bh+lh)  Area(Cube)=6 x Side 2  Volume=LxBxH  Volume= l 3

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

PARALLELOGRAM,RHOMBU S,SQUARE ANDRECTANGLE.

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

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

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