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coldgirl [10]
4 years ago
6

Use the information provided to write the equation of the circle Center: (10,-9) Point on Circle: (12,-13)

Mathematics
1 answer:
Zielflug [23.3K]4 years ago
7 0

Answer:

(x - 10)² + (y + 9)² = 20

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

The radius is the distance from the centre to a point on the circle

To calculate r use the distance formula

r = √(x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (10, - 9) and (x₂, y₂ ) = (12, - 13)

r = \sqrt{(12-10)^2+(-13+9)^2}

  = \sqrt{4+16} = \sqrt{20}, hence

(x - 10)² + (y - (- 9))² = (\sqrt{20})², that is

(x - 10)² + (y + 9)² = 20

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Find the are of the segment
Alex777 [14]

Answer:

(9\pi  - 18)cm^2

Step-by-step explanation:

To find the area of this section of the triangle, we will have to find the area of the sector, and then subtract the area of the triangle. To first find the area of the sector of the circle. Remember that the sector of a circle can be found using a proportion of angles. Since there is an angle of 90 degrees in the center. We will take that and divide it by 360 degrees, which is an entire circle. \frac{90}{360} = \frac{1}{4}, so the sector is one-quarter of the entire circle. Now find the area of the entire circle which will be \pi r^{2}× \frac{1}{4}, where r is 6 since it is the radius of the circle. So therefore the area of the sectore will be a quarter of 36\pi, which is 9\pi.

Now you must find the area of the triangle with side length 6. Remember, this is an isosceles triangle with sides length of 6 because two of the sides are radii. Also, remember that this is a 90 degree triangle, so the area of the triangle is simply \frac{6*6}{2}, which is 18 cm^2.

Now to find the area of just the yellow segment, just take the area of the sector we found, and subtract the area of the triangle. Therefore, the answer is (9\pi  - 18)cm^2

Hope this helped.

4 0
3 years ago
Which equation shows 4n=2(t-3) solves for t?
noname [10]

Answer:

t = 2n + 3

Step-by-step explanation:

Given

4n = 2(t - 3) ← divide both sides by 2

2n = t - 3 ( add 3 to both sides )

2n + 3 = t

5 0
4 years ago
What product is shown by the model 50 and 35
VikaD [51]
What product is shown by the model 50 and 35?

50 × 35 = 1750

The product if the model 50 and 35 is 1750. 
6 0
3 years ago
Read 2 more answers
Write and solve a measure of each angle.
aliya0001 [1]
They both are acute angles
8 0
3 years ago
I need help thankssssss<br> s
qaws [65]

Answer:

28 units

Step-by-step explanation:

Since, given triangles have same perimeters.

\therefore \: 5x + 5x + 3x + 2 = 6x + 3 + 2x + 1 + 4x \\  \\ 13x + 2 = 12x + 4 \\  \\ 13x - 12x = 4 - 2 \\  \\ x =  2 \\  \\ \implies 12x + 2 = 12( 2) + 4 = 24 + 4 = 28 \: units \\  \\ \&\: 13x + 2 =13(2) + 2 = 26 + 2 = 28  \: units\\  \\

So perimeter of each triangle is 28 units

4 0
3 years ago
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