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3 years ago

A chord is 15 cm long. It is 9 cm from the center of the circle. What is the radius of the circle?

Mathematics

1 answer:

Maurinko [17]3 years ago

3 0

Answer:

a²+b²=c²

7.5²+9²=c²

137.25=c²

√137.25=c²

11.72.... = c

The Radius of the circle is approximately 11.72cm

Step-by-step explanation:

Using this data. Create a Triangle with the Chord and Center of the dot. We know the distance between the chord and center which is one length of one of the sides.

We split the chord from the intersecting line from the center to the chord making the second line being 7.5cm

After We draw a line from the center of the circle to where the chord meets to the edge of the circle to create the triangle

We now have 2 measurements and can use Pythagorean Theorem to determine the radius from the missing length of the triangle.

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Classify each number below as a rational number or an irrational number.

coldgirl [10]

Answer:

Step-by-step explanation:

$\sqrt{29} - Irrational$

$\frac{10}{3} - Rational$

$-2\pi - Irrational$

$-52.(92) - Rational$

$-\sqrt{81} - Rational$

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3 years ago

-5 is to the _____ of 0. Answer early pls

Norma-Jean [14]

$\Huge\boxed{Hi~there!}$

On a number line, -5 is to the left of 0.

Remember, on a number line, positive numbers (including fractions, decimals and surds) are to the right of 0:

----------------------------------------------------------------------->

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Negative numbers (including rational and irrational numbers) are to the left of 0:

<-----------------------------------------------------------------

-8 -7 -6 -5 -4 -3 -2 -1 0

Hope it helps! Enjoy your day!

~Just a determined gal

$\bf{erutaNtneliS$

3 0

3 years ago

64 percent of 75 tiles as a percent

postnew [5]

The answer is 48--- 64% of 75=48

3 0

3 years ago

Find the perimeter of the following figure. a= 12 b=5 c=? its pythagorean theorem

mrs_skeptik [129]

Answer:

c=13 Perimeter=30

Step-by-step explanation:

c is equal to 13 so add all the sides together and you get 30

5 0

3 years ago

Read 2 more answers

What are the domain and range of the function f(x)= x^4 -6x^3 -4x^2 54x -45?

Agata [3.3K]

Domain is the numbers you can use
we can use all real numbers for this one

rangge is the numbers we get from inputting the domain

well, this is a 4th degree, so we need to find the minimum,because the leading coefient is positive so it opens up, and as x approaches negative and positive infinity, then f(x) approaches infnity

find minimum
take derivitive
f'(x)=4x^3-18x^2-8x+54
the zeroes are at about -1.652 and 1.9381 and 4.2145
we use a sign chart
the minimum occurs at hwere the derivitive changes from negative to positive
that is at -1.652 and 4.2145
evaluate f(-1.652) and f(4.2145)
f(-1.652)=-110.626
f(4.2145)=-22.124
the least value is -110.626
that is the minimum

so the domain is all real numbers
range is from -110.626 to infinity

8 0

4 years ago