What is the smallest angle of rotational symmetry for a square?

Mathematics

2 answers:

nlexa [21]3 years ago

7 0

The smallest will be 90 degree

Gemiola [76]3 years ago

7 0

Answer:90

Step-by-step explanation:

i got it right on the test :) good luck

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A triangle is dilated by a scale factor of 1/5 and then rotated 90 degree clockwise about the origin. Why is the image similar t

yan [13]

Answers:
The corresponding angles of the triangles are congruent
The image is a reduction of the pre-image
Neither the dilation nor the rotation change the shape of the triangle

Explanation:
For shapes to be similar:
1- there should be a ratio between the sides
2- angles in first shape should be congruent to angles in second shape

Now, a scale factor of 0.2 means that the sides of the image are 0.2 of the length of the original shape. However, angles are not changes

Let's check the choices:
1- The corresponding sides of the triangles are congruent:
This option is incorrect as dilation changes the lengths of the sides

2- The corresponding angles of the triangles are congruent:
This option is correct as neither dilation nor rotation alters the measures of the angles

3- The corresponding sides of the image are 5 times as long as those of the pre-image:
This option is incorrect as the sides of the image are only 0.2 times as long as those of the pre-image

4- The image is a reduction of the pre-image:
This option is correct as the sides of the image are 0.2 times those of the pre-image which means that the shape is reduced

5- Neither the dilation nor the rotation change the shape of the triangle:
This option is correct as both dilation and rotation are rigid transformations that do not alter the shape of the triangle (a triangle remains a triangle only with different side lengths)

6- The rotation reduces the size of the triangle:
This option is incorrect as rotation does not alter the size of the shape. It only changes its position

Hope this helps :)

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The triangles below are similar. Triangle Y X Z. Side Y X is 6 centimeters, X Z is 7 centimeters, and Z Y is 3 centimeters. Tria

kotykmax [81]

Answer:

I would go with c.

Step-by-step explanation:

Hope this helped!

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3 years ago

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Find the area of the circle to the nearest tenth. 8 cm

liraira [26]

Answer:

201.06.................

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What situation can be modeled using the same equation -4 + 4 equals 0

Lorico [155]

The answer is B because it is at -4 then increases 4 so now it is 0 degrees .

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3 years ago

brad converted 5/11 to a decimal, and his result was repeating decimal. does this mean that the value is rational or irrational?

Alina [70]

Answer: It means the value is rational

Step-by-step explanation:

Repeating decimals can be converted to fractions and rational numbers are numbers that can be expressed as a fraction but irrational numbers cannot be expressed as a fraction and neither does it terminate or repeat.

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3 years ago