MATHEMATICS LECTURE19TH 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=AREA

r=RADIUS

h=HEIGHT

SURFACE AREA

OF TRAPEZOID

FORMULA OF TRAPEZOID

h(𝑎+𝑏)

2= 𝑇𝑆𝐴

H= height

(a+b) = total length of

parallel sides