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Mathematics 19 Online
OpenStudy (anonymous):

If this figure has rotational symmetry, find the angle of rotation about the center that results in an image that matches the original figure.

OpenStudy (anonymous):

OpenStudy (anonymous):

The pattern seems to repeat 3 times, so 360/3 = 120 ANSWER: 120

OpenStudy (campbell_st):

there are 3 identical sections to your picture so 360/3 = 120 so turnint the image 120 degrees will see it return to its original form.

OpenStudy (anonymous):

n120º or 2πn/3

OpenStudy (anonymous):

Okay, I have more questions. A blueprint for a house has a scale of 1 : 35. A wall in the blueprint is 3 in. What is the length of the actual wall?

OpenStudy (anonymous):

105 inches.

OpenStudy (anonymous):

3*35.

OpenStudy (anonymous):

3x35=105" or 8',9"

OpenStudy (anonymous):

A microscope show you an image of an object that is 80 times the object's actual size. So the scale factor of the enlargement is 80. An insect has a body length of 7 millimeters. What is the body length of the insect under the microscope?

OpenStudy (anonymous):

The actual insect is 7 millimeters. The multiplier is 80. Therefore the insect will appear to be 50 * 7 = 560 millimeters.

OpenStudy (anonymous):

What type of is the equivalent of two reflections across intersecting lines?

OpenStudy (anonymous):

560 millimeters or 5.6 cm. If you mean how big it looks under the microscope if the real length is 7 mm.

OpenStudy (anonymous):

What type of is the equivalent of two reflections across intersecting lines?

OpenStudy (anonymous):

\[a ^{2}+b ^{2}=c ^{2}\] \[c ^{2}-b ^{2}=a ^{2}\] \[18 ^{2}-9 ^{2}=x ^{2}\] \[324-81=x^2\] \[x ^{2}=243\] \[x=\sqrt{234}\] \[x=9\sqrt{3}\]

OpenStudy (anonymous):

Sorry, wrong question.

OpenStudy (anonymous):

is it -glide reflection -rotation -reflection -none of these

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