Question

how can i find the measure of angle ACB?

Answer 1

any more info given?

Answer 2

" The figure below shows a triangle with vertices A and B on a circle and vertex C outside it. Side AC is tangent to the circle. Side BC is a secant intersecting the circle at point X."
and they gave me the options:

8°
16°
21°
29°

Answer 3

i dont know what does secant means.. :l

Answer 4

its just a line that intersects a circle in two places

Answer 5

they have given 100* as well.
what's that?

Answer 6

Thats the degree of the arc on the circle

Answer 7

sorry i can't solve this. :l

Answer 8

aw, shoot

Answer 9

i dont get the degree of the circle. Throw another one! :D

Answer 10

The last question I have is :
"If a similar cone has a slant height of 24 cm, what is its lateral surface area?

72π cm2
120π cm2
144π cm2
256π cm2

Answer 11

did u found the area for this?

Answer 12

I'm unable to find the similar radius, other than that i know the formula to solve what they're asking for

Answer 13

There's a formula,
\[\large \frac{A_2}{A_1} = (\frac{L_2}{L_1})^2\]

Answer 14

Does that A stand for area and the L stand for Length?

Answer 15

?

Answer 16

A = area. and L for length.

A1 = area of 1st fig
L1 = length of 1st fig.

Answer 17

how would i find the area for the second figure without a radius?

Answer 18

can we use Ratio method here?

Answer 19

Slant length : Area

20 : area of orig fig
24 : area of new fig.

Cross multiply. ;)

Answer 20

so the lateral area for the first figure would be 100 and i'd just put that in and cross multiply even without the other area?

Answer 21

20 : 100 pi
24 : x

Answer 22

so 2400 = 20x

Answer 23

so dividing that gave me 120. would that then be the area?

Answer 24

The answer's B. :D

Answer 25

omg yay, i actually got it

Answer 26

:)

Answer 27

math is easy isn't it?

Answer 28

yeah when someone is metaphorically holding your hand through literally every question, haha :)