All categories

2 years ago

A circle has a circumference of 7850 units. What is the radius?

Mathematics

1 answer:

wel2 years ago

6 0

Answer:

About 1249.366

Step-by-step explanation:

After plugging the circumference into the formula c=2π*r and solving, we get about 1249.366. You can round it however necessary :)

Hope I helped!

p.s: there's calculators online that can help you convert between circumference, diameter, area, and radius! Here's a link to one that I use!

https://www.omnicalculator.com/math/circumference

You might be interested in

The price of a watch was increased by 20% to £162. What was the price before the increase?

vfiekz [6]

Answer:

= £135

Step-by-step explanation:

Original price = 100%

Percentage increase = 20%

New price = 100% + 20% = 120%

If 120% = £162

What about 100% = ?

= (100 x 162) ÷ 120

= 16200 ÷ 120

= £135

6 0

2 years ago

Read 2 more answers

PLEASE I NEED HELP IM SO CONFUSED, ILL GIVE BRAINLIEST AND 5 STARS AND HEART IF CORRECT

ella [17]

Answer:

im pretty sure the ones that say "if not replaced" are independant, sorry if im wrong but im trying to help you out :)

Step-by-step explanation:

7 0

2 years ago

In circle o,find the value of x, rounded to the nearest tenth.

Gemiola [76]

Answer:

$\huge\boxed{x \approx 5.4}$

Step-by-step explanation:

We can break down this problem by first realizing different parts of the circle.

The line which is 8 units long is a chord of the circle.
The line that is 3.6 is almost the radius of the circle
The line that x sits on is the radius.

With this, we can find out if we find the radius of the circle, we have our answer.

We should also note that the angle formed by the 3.6 units long line and the chord is a right angle.

What we need is a way to find the radius of the circle. This will get us x. The radius of a circle will be the length of any line that starts from point O and ends at the circle edge.

If we draw a line connecting the end of the 3.6 line at point O to the end of the 8 unit long chord, we get a triangle! (Image attached for reference).

We can solve for the hypotenuse using the Pythagorean Theorem. This theorem states that:

$\displaystyle a^2 + b^2 = c^2$

Since we know one side is 3.6, we can use that as A. The second side will be 4 since the 3.6 line lies directly in the center of the chord = 8/2 = 4!

$3.6^2 + 4^2 = c^2$
$12.96+16=c^2$
$28.96=c^2$
$\sqrt{28.96} = c$
$5.4 \approx c$

Therefore, since this is the radius of the circle (also the hypotenuse), this can be said for any line that comes from point O onto the edge of the circle.

The line X does just that. Therefore, the value of x is also 5.4.

Hope this helped!