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Trava [24]
3 years ago
12

What is the circumference of a QUATER CIRCLE if the radius of the quater circle is 2CM

Mathematics
1 answer:
MissTica3 years ago
8 0
To find the area of a quarter circle, you simply take a quarter of a full circle. As all quarters are equal, this means that the formula would be <span><span>π<span><span>r2</span>4</span></span><span>π<span><span>r2</span>4</span></span></span><span>.  But wait, there's more. If you notice, </span><span><span>π<span><span>r2</span>4</span>=π<span><span>r2</span>2</span></span><span>π<span><span>r2</span>4</span>=π<span><span>r2</span>2</span></span></span><span>. This coincides with the circle formula, just with half the radius. Notice anything? A quarter of a circle can be calculated in the same way a circle a quarter the size can. This means that a quarter circle is equal to a circle a quarter size. In this same way, a ninth of a circle is equal to a circle of one ninth the size.</span>
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The area of a rectangular playground is 16 square yards. The length of the playground is 4 times longer than
Alexxandr [17]

length = 8 yd and width = 2 yd

So, Option D is correct.  

Step-by-step explanation:

Area of rectangular playground = 16 square yards

Width of playground = w

Length of playground = l = 4w

We need to find length(l) and width(w)

The formula used is:

Area = Length * Width

Putting values:

Area = Length * Width\\16=4w*w\\16=4w^2\\w^2=\frac{16}{4}\\w^2=4\\Taking\,\,square\,\,root:\\\sqrt{w^2}=\sqrt{4}\\ w=\pm 2

Since width of rectangle is always positive, so we will take w = 2

So. Width = 2

Length = 4w = 4(2) = 8

Hence, length = 8 yd and width = 2 yd

So, Option D is correct.  

Keywords: Area of rectangle

Learn more about Area of rectangle at:

  • brainly.com/question/4054269
  • brainly.com/question/4459688
  • brainly.com/question/6564657

#learnwithBrainly

3 0
3 years ago
Factor 4 ^2 + 1 2 <br>4 x^2 + 1 2
olga2289 [7]

Answer:

4(31x^2+7)

Step-by-step explanation:

8 0
3 years ago
Sally received scores on math quizzes as shown bellow. Find her mean score. 84,85,91,81,52,92,99,91 and 41
muminat

Answer:79.5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Can anyone help me plz ?? Lakita has 66 water bottles for the 5K race participants. In addition, she is planning to buy boxes of
Ivanshal [37]

Answer:

65,81,97,113,129


Step-by-step explanation:


she has 65 water bottles and she is buying boxes of water bottles (x) that hold 16 water bottles each. She can only buy up to 5 water bottles.



f(x) = 16x + 65...where f(x) = total water bottles and x = number of boxes


x < = 5 here is ur restriction



the range is ur f(x) values which represent the total number of water bottles...keep in mind, she can only buy 5. Therefore, the numbers that can be subbing in for x are 0 thru 5.



So when subbing in 0 thru 5 for x, the results for f(x) are :


{ 65,81,97,113,129 }

8 0
2 years ago
Which of these shapes have rectangular cross sections when they are cut perpendicular to the base? Check all that apply.
mezya [45]
Rectangular prism...becuase it is in rectangular shape..no matter how you cut it..it will give u a rectangle
6 0
3 years ago
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