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Andrei [34K]
3 years ago
8

What’s the formulas for D,C and A

Mathematics
1 answer:
Travka [436]3 years ago
6 0

Answer:

<u>d = 2r or d = C/π</u>

Diameter is equal to two times the radius or Circumference/π

<u>C = 2πr</u>

Circumference is equal to two times π multiplied the radius

<u>A = π * r²</u>

The area of the circle equals to π multiplied by the radius squared

Step-by-step explanation:

Let's find the formulas for d, C and A

d = diameter

C = Circumference

A = Area

r = radius

π ≅ 3.1416

d = 2r or d = C/π

Diameter is equal to two times the radius or Circumference/π

C = 2πr

Circumference is equal to two times π multiplied the radius

A = π * r²

The area of the circle equals to π multiplied by the radius squared

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The perimeter of a rectangle is 72 cm. The length is 3 more than twice the width What
solmaris [256]
<h3><u>Solution</u></h3>

<u>Given </u><u>:</u><u>-</u>

  • Perimeter of rectangle = 72 cm
  • The length is 3 more than twice the width.

<u>F</u><u>i</u><u>n</u><u>d</u><u> </u><u>:</u><u>-</u>

  • Dimensions of rectangle
<h3 /><h3><u>Explantion</u></h3>

<u>Using </u><u>Formula</u>

\boxed{\underline{\tt{\red{\:(perimeter_{rectang}\:=\:2\times (Length+Width)}}}}

<u>Let,</u>

  • Length of Rectangle = x cm
  • Breadth of Rectangle = y cm

<u>According</u><u> to</u><u> question</u><u>,</u>

==> perimeter of Rectangle = 72

==> 2(x+y) = 72

==> x + y = 72/2

==> x + y = 36_________________(1)

<u>Again,</u>

==> x = 2y + 3

==> x - 2y = 3__________________(2)

<u>Subtract</u><u> </u><u>equ(</u><u>1</u><u>)</u><u> </u><u>&</u><u> </u><u>equ(</u><u>2</u><u>)</u>

==> y + 2y = 36 - 3

==> 3y = 33

==> y = 33/3

==> y = 11

<u>keep </u><u>in </u><u>equ(</u><u>1</u><u>)</u>

==> x - 2×11 = 3

==> x = 3 + 22

==> x = 25

<h3><u>Hence</u></h3>

  • <u>Length</u><u> of</u><u> </u><u>Rectangle</u><u> </u><u>=</u><u> </u><u>2</u><u>5</u><u> </u><u>cm</u>
  • <u>Width </u><u>of </u><u>Rectangle</u><u> </u><u>=</u><u> </u><u>1</u><u>1</u><u> </u><u>cm</u>

<h3><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u></h3>

<h3 />

7 0
3 years ago
The parallelogram shown represents a map of the boundaries of a natural preserve. Walking trails run from points A to C and from
Citrus2011 [14]

y+2 = 3y-4 =

y+6 = 3y

6 =2y

y = 3


y+2 = 3+2 = 5

3y-4 = 3(3)-4 = 5

 5+5 =10


2y-3 = 2(3) - 3 = 3

3+3 = 6


10+6 = 16 miles

answer is C

4 0
4 years ago
Read 2 more answers
Which sets of values can be the measures of the exterior angles of a triangle?
romanna [79]
The 3 angles must add up to 360 degrees

Only 1 and 4  fit the bill.
5 0
3 years ago
If you roll two number cubes ,what is the probability of their sum being 9 or higher?
bija089 [108]

Answer:

5/18

Step-by-step explanation:

When two cubes are rolled there are 36 possibilities

Each dice has 6 equally like outcomes so possibilities are

(1,1)  (1,2)          (1,3)          (1,4)         (1,5)         (1,6)

(2,1)  (2,2)  (2,3)  (2,4)  (2,5)  (2,6)

(3,1)  (3,2)  (3,3)  (3,4)  (3,5)  (3,6)

(4,1)  (4,2)  (4,3)  (4,4)  (4,5)  (4,6)

(5,1)  (5,2)  (5,3)  (5,4)  (5,5)  (5,6)

(6,1)  (6,2)  (6,3)  (6,4)  (6,5)  (6,6)

Now we look at the pair that has sum equal to 9

(3,6) (4,5) (5,4) (6,3) that has sum of 9

Probability of sum is 9 = \frac{4}{36}

we look at the pairs that has sum greater than 9

(4,6) (5,5)(5,6) (6,4)(6,5)(6,6)

Probability of sum greater than 9 = \frac{6}{36}

Probability of sum 9 or higher = P(sum 9) + P(greater than 9)

= \frac{4}{36}+\frac{6}{36}= \frac{10}{36}=\frac{5}{18}



4 0
3 years ago
25 points! pls show work if can!!!!!!!!
Nataliya [291]

Answer: 8.4

Step-by-step explanation:

15-6.6

3 0
3 years ago
Read 2 more answers
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