Which expression can be used to find the radius of a circle with a diameter of 90 inches?

Mathematics

2 answers:

rjkz [21]2 years ago

6 0

The answer to this is C, 90/2

Zolol [24]2 years ago

6 0

Answer:

c=90/2

Step-by-step explanation:

the center of the circle is your starting point and if you draw a line straight down the middle then mark your starting point then the circle is cut in 2 then theres your answer

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PLEASE HELP ME GUYS :((

Veseljchak [2.6K]

Answer:

8 - $8\sqrt{3}$

Step-by-step explanation:

For this problem you have to use the 45-45-90 triangle theorem and 30-60-90 theorem.

For 45-45-90, the isosceles sides = 4, so the hypotenuse of the 30-60-90 triangle is 4 times 2, which is 8. If x is 8, then since y is the side across from the 60 angle, y is $8\sqrt{3$ . Since this really can't be simplified after y is subtracted from x, the final answer is just 8 - $8\sqrt{3}$ .