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storchak [24]
3 years ago
14

2) A ray is a geometric figure that consist of

Mathematics
1 answer:
Leno4ka [110]3 years ago
6 0

Answer:

A single point and a line that extends forever in one direction

Step-by-step explanation:

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Determine which of the transformations applied to Circle A could be used to prove Circle A is similar to Circle B. Select Yes or
Alenkinab [10]

Answer:

Step-by-step explanation:

Circle A has center (-2, 3)

Circle B has center (2, -2)

Circle A can be mapped to Circle A' by a translation:

Center         Rule of translation   New center

 (x, y)                 (x+4, y-5)

A(-2, 3)           A'(-2+4, 3-5)           A'(2, -2)

Circle A with radius r 1=2

Circle B with radius r 2=3

Scale factor= r 2/r 1 = 3/2 = 1.5

Since any two circles can be translated to have the same center, the dilation r2/r1 proves  the circles are similar where r1 and r2 are the radii of the circles.

The Circle A' and circle B both have center (2, -2). Then circle A' can be mapped to circle B by a dilation with center (2, -2) and a scale factor 3/2=1.5. So circle A and circle B are similar.

Therefore:  Translation right 4, down 5, and then a dilation of 1.5 is true.

                   Translation down 5, right 4, and then a dilation of 1.5 is true.

5 0
3 years ago
What are the first 50 numbers of pie?
Tomtit [17]

Answer:

3.14159265358979323846264338327950288419716939937510

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Which of the following points below represents (- 2, - (5pi)/4) the polar grid?
Maru [420]

Answer:

Well, when we have a point in rectangular coordinates (x, y) and we want to write it in polar coordinates (r, θ) the rule we use is:

r = √(x^2 + y^2)

θ = Atg(Iy/xI) + 90°*(n - 1)

where n is number of the quadrant where our point is.

For example, if we are on the second quadrant, we use n = 2.

Now, if instead, we have the point (r, θ) and we want to rewrite it in rectangular coordinates, then the transformation is:

x = r*cos(θ)

y = r*sin(θ)

Now we have the point (- 2, -(5pi)/4) because the first part is negative, this number can not be in polar coordinates (r can not be negative) then we have:

x = -2

y = -(5*pi)/4

Using the first relation, we can find that:

r = √( (-2)^2 + (-5*3.14/4)^2) = 4.4

(rememer that the point (- 2, -(5pi)/4) is on the third quadrant, then we will use n = 3.)

θ = Atg(-(5*pi)/4/-2) + 90°*(3 - 1)= Atg((5*pi)/2) + 180° = 82.7° + 180° = 262.7°

Then the point that represents  (- 2, - (5pi)/4) in polar coordinates is the point:

(4.4, 262.7°)

If instead of degrees, the angle part is written in radians, we have:

180° = 3.14 radians.

262.7° = x radians.

then:

x/3.14 = (262.7)/180

x =  3.14*(262.7)/180 = 4.58 radians.

then the point will be:

(4.4, 4.58 radians)

7 0
3 years ago
Find correct two decimal places, the radius of the circle with the given circumference: 35cm
Vsevolod [243]
C=2 \pi r
C - circumference, r - radius

C=35 \ [cm] \\ \\
35=2 \pi r \\
r=\frac{35}{2 \pi} \\
r=\frac{17.5}{\pi} \\
\boxed{r \approx 5.57 \ [cm]}
4 0
3 years ago
Read 2 more answers
adhonest started in 70% if his team's soccer games this season. he started a total of 21 games. how many games did adhonest team
kotegsom [21]

Answer:14.7 games

Step-by-step explanation:

0.70 times 21 = 14.7

3 0
3 years ago
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