MATHEMATICS LECTURE

19TH MARCH 2014

VOLUME OF CONE

FORMULA OF CONE

V=πr2 h/3

EXAMPLE

QUESTION 1

what is the volume of this cone? ( π=3.142)

QUESTION 2

Given a cone with the height of 10cm and the diameter of the circle is 18cm. Find the volume of this cone. Take π as 3.142.

SURFACE AREA OF

CONE

A=πr(r+√h2

+r2)

A=AREAr=RADIUSh=HEIGHT

SURFACE AREA OF TRAPEZOID

FORMULA OF TRAPEZOID

h

H= height

(a+b) = total length of

parallel sides