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SVEN [57.7K]
3 years ago
8

Find the perimeter of triangle CDE. Round to the nearest tenth.

Mathematics
2 answers:
nevsk [136]3 years ago
7 0
Here's how you do it: you find all the distances between the three points and add them together to calculate the perimeter of the triangle. To calculate for the distance between two points, the formula is

d = √[(x2 - x1)² + (y2 - y1)²]

So, just take two points, assign x1 and x2 with corresponding y1 and y2, then you get the answer.

Points: D(1,4), E(3,-2), C(-3,1)

After substituting the answers would be:
DE = 6.3 units
CE = 6.7 units
CD = 5 units

Perimeter = 6.3 + 6.7 + 5
Perimeter = 18 units
777dan777 [17]3 years ago
7 0

Answer: 18.0

Step-by-step explanation:

The distance formula to find the distance between two points P(a,b) and Q(c,d) is :_

d=\sqrt{(d-b)^2+(c-a)^2}

From the graph, the coordinates of ΔCDE are C(-3,1) , D(1,4) and E(3,-2).

Then, length of CD :-

CD=\sqrt{(4-1)^2+(1-(-3))^2}\\=\sqrt{9+16}=\sqrt{25}=5

Length of DE :-

DE=\sqrt{(-2-4)^2+(3-1)^2}=\sqrt{36+4}\\=\sqrt{40}=5\approx6.3

Length of EC :-

EC=\sqrt{(-3-3)^2+(1-(-2))^2}=\sqrt{(-6)^2+(3)^2}\\=\sqrt{45}=5\approx6.7

Now, the perimeter of triangle :_

CD+DE+EC=5+6.3+6.7=18.0\text{ units}

Hence, the perimeter = 18.0 units

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Which equation is correctly rewritten to solve for x?
ikadub [295]

Answer:

Option (A)

Step-by-step explanation:

Te given equation is,

-qx + p = r

Toe find the value of x,

By subtracting  p from both the sides of the equation.

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-qx = r - q

By dividing the whole equation by (-q),

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3 years ago
A region R in the xy-plane is given. Find equations for a transformation T that maps a rectangular region S in the uv-plane onto
ruslelena [56]
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As v ranges from c to d, 2(v - c) / (d - c) + 1 will range from 1 to 3, which is the perfect range for the radius. As u ranges from a to b, pi * (u - a) / (2b - 2a) will range from 0 to pi/2, which is the perfect range for the angle. So, this maps the rectangle to R.
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Point C is twice as close to point B as it is to point A. If point A is at -30 and point B is at 30, what are two possible value
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different between A and B

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=60

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How can you model data with a linear function
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