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galina1969 [7]
4 years ago
12

If a figure can match itself in 3 positions, what is the angle of rotation?

Mathematics
1 answer:
Amiraneli [1.4K]4 years ago
4 0
Symmetry is 360 degrees. ... by 90 degrees, 180 degrees and 270 degrees,
 it never gets the exact position<span>.</span>
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From base camp, a hiker walks 3.5 miles west and 1.5 miles north. Another hiker walks 2 miles east and 0.5 miles south. To the n
levacccp [35]

Answer:

The hikers are 5.9 miles apart.

Step-by-step explanation:

Let O represents the base camp,

Suppose after walking 3.5 miles west, first hiker's position is A, then after going 1.5 miles north from A his final position is B,

Similarly, after walking 2 miles east, second hiker's position is C then going towards 0.5 miles south his final position is D.

By making the diagram of this situation,

Let D' is the point in the line AB,

Such that, AD' = CD

In triangle BD'D,

BD' = AB + AD' = 1.5 + 0.5 = 2 miles,

DD' = AC = AO + OC = 3.5 + 2 = 5.5 miles,

By Pythagoras theorem,

BD^2 = BD'^2 + DD'^2

BD = \sqrt{2^2 + 5.5^2}=\sqrt{4+30.25}=\sqrt{34.25}\approx 5.9

Hence, the hikers are 5.9 miles apart.

8 0
3 years ago
10 have volunteered to help with the preparations for a party. How many ways can Susan assign someone to buy​ beverages, someone
Lesechka [4]

Answer:

The answer is 720 ways.

Step-by-step explanation:

Total friends who volunteered = 10

Total number of jobs that have to be done = 3

Here order matters, so it is a permutation question.

We can use the formula nPr.

= \frac{10!}{7!}

= 720 ways.

The second way to solve this is:

Susan can choose the first person to do a job in 10 ways

Then the second job can be done in 9 ways and the third in 8 ways.

Total becomes = 10\times9\times8=720 ways

5 0
4 years ago
Lance has 9 package of sports cards. Each package has 108 cards . About how many cards does Lance have?
horrorfan [7]
It would be 972 cards
7 0
3 years ago
Read 2 more answers
Describe the quadrilateral???....<br> It is a rectangle? and what else?
anygoal [31]

Last time I checked- it was a rhombus.

7 0
4 years ago
PLEASE I NEED THE CORRECT ANSWER !!!
Fittoniya [83]
Area of a circle is simple pi*r^2=A so rewriting the equation to solve for r^2 leads to r^2 = A/pi so plugging in numbers 682 for A and pi is just pi you get 682square meters/pi = r^2

6 0
3 years ago
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