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ivanzaharov [21]
3 years ago
13

Marissa has a wool rug that has the shape of a regular octagon in her living room. The diameter of the incircle of the rug measu

res 7 feet approximately. Which of the following is the approximate measure of one of the sides of wool rug?
A.2.9 feet
B. 3.5 fest
C. 3.7 feet
D. 4.1 feet
Mathematics
2 answers:
alexira [117]3 years ago
7 0
We know that the diameter of the inner circle (d) and the side of a regular octagon (s) are tied by the formula:

d = (1 +√2) × s

The inverse formula is:

s = d / <span>(1 +√2)

Plugging in numbers:
s = 7 (1 + </span>√2)
   = 2.9 ft

Therefore the correct answer is A) <span>2.9 feet</span>
Mariana [72]3 years ago
4 0

Answer:

2.9 feet

Step-by-step explanation:

I did it a different way. One including trigonometry. The question only tells the apothem, "diameter of the incircle." Apothem is the line segment from the center to the midpoint of segments in regular polygons. Incircle is a circle that connects all the midpoints in a regular polygon. You are trying to find the side. The angle of view is from the central angle, which is 45 degrees in an octagon. We have to split 45 in half, because when you try to find distance in a line segment, you do it through trig and trig requires a right triangle. Since you are finding the side, you need tangent. The angle of view (I don't know if that's the actual name), it touches the apothem, which would be adjacent. The line that the angle isn't touching is the  opposite. And tanganent uses both of those. The formula I used is tan(22.5)/1 = o/7. These are fractions. Then you cross multiply the fractions, so tan(22.5) goes with 7 and o goes with 1. When you cross multiply, you pretty much multiply the opposite fraction's side. The formula then would be o = tan(22.5) x 7. And that equals 2.9.

Read more on Brainly.com - brainly.com/question/9419197#readmore

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Raquel can type 63 words every minnute.Rick type then Raquel in 135 minute?Circle the letter of the correct answer.A 1350 B 4599
lozanna [386]

Answer: 1350

Step-by-step explanation:

Here is the correct question.

Raquel can type an average of 63 words per minute. Rick can type 73 words per minute. how many more words can Rick type than Raquel in 135 minutes? Jared chose B as the correct answer. How did he get that answer? Jared said the answer is 4599. How did he get that answer?

Rick's word per minute= 73

Raquel's word per minute= 63

Ricks word in 135minute= 73×135 = 9855

Raquel's word in 135 minutes=63×135 = 8505

=9855 - 8505

= 1350

Rick can type 1350 more words than Raquel in 135 minutes.

Jared's answer is wrong. He got the answer by multiplying 63 by 73 which gives 4599.

8 0
3 years ago
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max2010maxim [7]

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Step-by-step explanation:

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Answer:

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