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Orlov [11]
3 years ago
10

Circle assignment! THANKS so much its worth so much of my grade

Mathematics
1 answer:
kogti [31]3 years ago
6 0

Answer:

1. B) Figure B.

2. C) Figure C.

3. D) Figure D.

4. C) Figure C.

Step-by-step explanation:

Given: Radius of Circle A= 4

           Radius of Circle B= 5

           Radius of circle C= 6

           Radius of circle D= 7

Now, finding circumference and area of all the circle.

We know, circumference of circle= 2\pi r

Area of circle= \pi r^{2}

Where, r= radius of circle and π = 3.14

First, solving for figure A

Circumference= 2\times 3.14\times 4= 25.12\ cm

Area= 3.14\times 4^{2} = 50.24\ cm^{2}

Solving for Figure B

Circumference= 2\times 3.14\times 6= 31.4\ cm

Area= 3.14\times 5^{2} = 78.5\ cm^{2}

Solving for Figure C

Circumference= 2\times 3.14\times 6= 37.68\ cm

Area= 3.14\times 6^{2} = 113.04\ cm^{2}

Solving for Figure D

Circumference= 2\times 3.14\times 7= 43.96\ cm

Area= 3.14\times 7^{2} = 153.86\ cm^{2}

∴ 1. Answer is Figure B.

   2. Answer is figure C.

   3. Answer is Figure D

   4. Answer is Figure C.

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A triangle has a base of 4/5 of a yard and a height of 2/3 of a yard. What is the area of this triangle?
Elena-2011 [213]

Answer:

8/15

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4/5 times 2/3

4 0
3 years ago
Johnny rode his bike 4/7 of a mile from his house to the lake on a straight path. then, he turned around and rode his bike 3/1/8
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I hope this helps you



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2 31/56

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3 years ago
Read 2 more answers
M(8, 5) is the midpoint of JK. The coordinates of point J are (5, −6) . What are the coordinates of point K?
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8 0
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Graph △ABC with vertices A(2, 3), B(−4, −3), and C(2, −3). Find the coordinates of the circumcenter.
Stolb23 [73]
Circumcenter = (-1,0)  
The circumcenter of a triangle is the intersection of the perpendicular bisectors of the sides of the triangle. So let's calculate a couple of the bisectors and determine their intersection. 
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 Perpendicular bisector will have a slope of -1 and will pass through point ((2-4)/2,(3-3)/2) = -2/2,0/2) = (-1,0)
 Equation is of the form
 y = -x + b
 Substitute known point
 0 = -(-1) + b
 0 = 1 + b
 -1 = b
 So the equation for the perpendicular bisector of AB is
 y = -x - 1 
 Now let's calculate the perpendicular bisector of BC
 Slope BC = (-3 - -3)/(-4 - 2) = (-3 + 3) / (-6) = 0/-6 = 0. This means that the
line is horizontal and that the perpendicular bisector will be a vertical line with infinite slope. A point that line will pass through is ((-4 + 2)/2, (-3 + -3)/2) =
(-2/2, 0/2) = (-1,0). So the equation for the line is:
 x = -1 
 Now we want the intersection between
 x = -1 and y = -x - 1
 Since we know that x has to be -1, just substitute it into the 2nd equation.
 y = -x - 1
 y = -(-1) - 1
 y = 1 - 1
 y = 0
 
 So the circumcenter is (-1,0).
 Let's verify that. The distance from the circumcenter to each vertex of the triangle will be the same. Using the Pythagorean theorem, C^2 = A^2 + B^2. We're not going to bother taking the square root since if the squares are equal, then square roots will also be equal.
 Distance^2 from (2,3):
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 (-4 - -1)^2 + (-3 - 0)^2 = -3^2 + -3^2 = 9 + 9 = 18 
 Distance^2 from (2,-3):
 (2 - -1)^2 + (-3 - 0)^2 = 3^2 + -3^2 = 9 + 9 = 18 
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5 0
3 years ago
Help Asap!!!!!!<br> Brainliest!
Nastasia [14]

Answer:

f(-2.75)=-1

Step-by-step explanation:

Here we are given a Greatest Integer Function . The characteristic of this function is that it when operated , gives you the greatest integer it has near to it.

Hence if we have any greatest integer function f(x)=[x] , for x = -2.75

[-2.75]=-2 , as -the greatest integer near to -2.75 is -2 as -3<-2

Now coming back to our problem, our function is

f(x)=[x]+1

Hence for x=-2.75

f(x)=[-2.75]+1

as we discussed above [-2.75]=-2

Hence

f(-2.75)=-2+1

f(-2.75)=-1

6 0
3 years ago
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