Math Gillg

PROJECT OF CLASS 8

TOPIC OF PROJECT

Total surface of cylinder of height h and radius r

AREA OF RECTANGLE

Area of rectangle of length L and breadth B is given by L * B square units

B

L

AREA OF CIRCLE

Area of circle of radius R is given by

Πr2

r

PERIMETER OF CIRCLE Perimeter of circle of radius R is given by

2Πr

r

PERIMETER OF RECTANGLE

Perimeter of rectangle of length L and breadth B is given by 2*(L+B) square units

CYLINDER A cylinder is made up of three surfaces: two circles and one rectangle.

Figure of a cylinder r

h

FIRST SURFACE OF CYLINDER

r

SECOND SURFACE OF CYLINDER

THIRD SURFACE OF CYLINDER

r

AREA OF FIRST SURFACE

r

Πr2 Square units

AREA OF SECOND SURFACE

L*B 2Πrh

AREA OF THIRD SURFACE

r

Πr

2

TOTAL SURFACE AREA OF CYLINDER =Area of 1st surface+ area of 2nd surface+area of 3rd surface =Π r 2 + 2 Π r h + Π r 2 =2 Π r ( r+h )

r

h

THANK YOU