anonymous
  • anonymous
how can i find the measure of angle ACB?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
saifoo.khan
  • saifoo.khan
any more info given?
anonymous
  • anonymous
" 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°

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saifoo.khan
  • saifoo.khan
i dont know what does secant means.. :l
anonymous
  • anonymous
its just a line that intersects a circle in two places
saifoo.khan
  • saifoo.khan
they have given 100* as well. what's that?
anonymous
  • anonymous
Thats the degree of the arc on the circle
saifoo.khan
  • saifoo.khan
sorry i can't solve this. :l
anonymous
  • anonymous
aw, shoot
saifoo.khan
  • saifoo.khan
i dont get the degree of the circle. Throw another one! :D
anonymous
  • anonymous
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
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saifoo.khan
  • saifoo.khan
did u found the area for this?
anonymous
  • anonymous
I'm unable to find the similar radius, other than that i know the formula to solve what they're asking for
saifoo.khan
  • saifoo.khan
There's a formula, \[\large \frac{A_2}{A_1} = (\frac{L_2}{L_1})^2\]
anonymous
  • anonymous
Does that A stand for area and the L stand for Length?
anonymous
  • anonymous
?
saifoo.khan
  • saifoo.khan
A = area. and L for length. A1 = area of 1st fig L1 = length of 1st fig.
anonymous
  • anonymous
how would i find the area for the second figure without a radius?
saifoo.khan
  • saifoo.khan
can we use Ratio method here?
saifoo.khan
  • saifoo.khan
Slant length : Area 20 : area of orig fig 24 : area of new fig. Cross multiply. ;)
anonymous
  • anonymous
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?
saifoo.khan
  • saifoo.khan
20 : 100 pi 24 : x
anonymous
  • anonymous
so 2400 = 20x
anonymous
  • anonymous
so dividing that gave me 120. would that then be the area?
saifoo.khan
  • saifoo.khan
The answer's B. :D
anonymous
  • anonymous
omg yay, i actually got it
saifoo.khan
  • saifoo.khan
:)
saifoo.khan
  • saifoo.khan
math is easy isn't it?
anonymous
  • anonymous
yeah when someone is metaphorically holding your hand through literally every question, haha :)

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