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3 years ago

How many lines of symmetry does a regular octagon have?

Mathematics

1 answer:

Lesechka [4]3 years ago

7 0

Answer:

Step-by-step explanation:

An Equilateral Triangle (3 sides) has 3 Lines of Symmetry
A Regular Pentagon (5 sides) has 5 Lines of Symmetry
A Regular Hexagon (6 sides) has 6 Lines of Symmetry
A Regular Heptagon (7 sides) has 7 Lines of Symmetry
A Regular Octagon (8 sides) has 8 Lines of Symmetry

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PLEASE HELP IM TAKING A TEST AND I DONT KNOW WHAT IM DOING!!!!

DENIUS [597]

Answer:A

Step-by-step explanation:I’m pretty sure that the answer is rotation because it is clear that the triangle rotated over the graph.

5 0

3 years ago

A line passes through the point (1, 5) and has a slope of -9.

vladimir1956 [14]

Answer:

y= -9x+14

Step-by-step explanation:

the equation of a straight line is y=mx+c

m is the slope

And we are given a y and x term

So we substitute these into the equation:

5= -9(1) + c

rearragne to find c

14= c

so the full equation is:

y= -9x+14

8 0

2 years ago

5x-6=29. What does x equal

anastassius [24]

Answer:

Solution given:

5x-6=29.

5x=29+6

x=35/5=7

x=7 is your answer

7 0

2 years ago

Read 2 more answers

Help me guys <br> thx so much

navik [9.2K]

Answer:

Option D, $10x^4\sqrt{6} +x^3\sqrt{30x} -10x^4\sqrt{3} -x^3\sqrt{15x}$

Step-by-step explanation:

<u>Step 1: Multiply</u>

<u /> $(\sqrt{10x^4} -x\sqrt{5x^2} )*(2\sqrt{15x^4} + \sqrt{3x^3})\\ (\sqrt{10 * x^2 * x^2} -x\sqrt{5 * x^2} ) * (2\sqrt{15 * x^2 * x^2} +\sqrt{3 * x^2 * x})\\(x^2\sqrt{10} -x^2\sqrt{5} )*(2x^2\sqrt{15} +x\sqrt{3x}) \\\\$

$(x^2\sqrt{10}*2x^2\sqrt{15} )+(x^2\sqrt{10}*x\sqrt{3x} ) + (-x^2\sqrt{5} *2x^2\sqrt{15}) + (-x^2\sqrt{5} *x\sqrt{3x}$

$(2x^4\sqrt{150} ) + (x^3\sqrt{30x}) + (-2x^4\sqrt{75}) + (-x^3\sqrt{15x} )$

$2x^4\sqrt{5^2*6} + x^3\sqrt{30x} -2x^4\sqrt{5^2*3} -x^3\sqrt{15x}$

$10x^4\sqrt{6} +x^3\sqrt{30x} -10x^4\sqrt{3} -x^3\sqrt{15x}$

Answer: Option D, $10x^4\sqrt{6} +x^3\sqrt{30x} -10x^4\sqrt{3} -x^3\sqrt{15x}$

6 0

3 years ago

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What is 6 2/5 added by 2 3/10.Make sure your answer is fully reduced

slava [35]

Answer:

8 7/10

Step-by-step explanation:

6 0

2 years ago

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