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Karo-lina-s [1.5K]
3 years ago
7

Circle O has a circumference of 36 cm.

Mathematics
2 answers:
Svetach [21]3 years ago
8 0

Answer: 18 cm

Step-by-step explanation:

  1. C= 2πr
  2. plug it in! 36 π = 2 π r
  3. divide both sides by π and you get 36= 2r
  4. divide both sides by 2 and you get that 18= r
  5. so r, or the radius, equals 18
viva [34]3 years ago
4 0
The answer is 18cm I hope
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Juan invest $3700 in a simple interest account at a rate of 4% for 15 years
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<em><u>Question:</u></em>

Juan Invest $3700 In A Simple Interest Account At A Rate Of 4% For 15 Years. How Much Money Will Be In The Account After 15 Years?

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Since OB and OA have the same length, triangle OAB is isosceles, but more than that, it's also equilateral. Why? Because the interior angles of any triangle always add to \pi radians. We know one of the angles is \frac\pi3 radians, which leaves a contribution of \frac{2\pi}3 radians between the remaining angles A and B. Angles A and B must be congruent (because OAB is isosceles), which means they also have measure \frac\pi3 radians.

Next, draw an altitude of the triangle through point B, and label the point where it meets the "base" OA, C. Since OAB is equilateral, the altitude BC is also a perpendicular bisector. That means OC has length \frac12, and by definition of \cos we have

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3 0
3 years ago
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