1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
abruzzese [7]
3 years ago
11

Find the perimeter of a semi circle whose diameter is 21cm​

Mathematics
1 answer:
Gala2k [10]3 years ago
4 0

Answer:

<h3>\boxed{ \boxed{ \bold{  \purple{16.485 \: cm}}}}</h3>

Step-by-step explanation:

Diameter ( d ) = 21 cm

Radius is just half of the diameter

Radius ( r ) = \sf{ \frac{21}{2} } = 10.5 cm

Now, let's find the perimeter of a semi - circle :

\sf \frac{1}{2} \pi \: r \:

Plug the values

⇒\sf{ \frac{1}{2}  \times 3.14 \times 10.5}

Calculate

⇒\sf{16.485 \: cm}

Hope I helped!

Best regards!

You might be interested in
Karen and Tom sold candy bars for a fundraiser, Karen sold 7 less than twice the number of candy
Eddi Din [679]

Answer:

89

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
NEED ASAP !!! helppppp
ivanzaharov [21]

Answer: 960

Step-by-step explanation: all you have to do to find the volume is 10*8*12, which would be 960, so the cubic volume is 960.

4 0
4 years ago
Helpigiverailiestifuaser
Burka [1]

Answer:

35 books

Step-by-step explanation:

40*3=120

120-85=35

7 0
3 years ago
The points(0,2) and (4,-10) lie on the same line and the points (-5,-3) and (2,11) lie on another line. Determine by graphing wh
joja [24]
You are asked to do this problem by graphing, which would be hard to do over the Internet unless you can do your drawing on paper and share the resulting image by uploading it to Brainly.

If this were homework or a test, you'd get full credit only if you follow the directions given.

If <span>The points(0,2) and (4,-10) lie on the same line, their slope is m = (2+10)/(-4), or   m =-3.  Thus, the equation of this line is y-2 = -3x, or y = -3x + 2.

If </span><span>points (-5,-3) and (2,11) lie on another line, the slope of this line is:

m = 14/7 = 2.  Thus, the equation of the line is y-11 = 2(x-2), or y = 11+2x -4, or y = 2x + 7.

Where do the 2 lines intersect?  Set the 2 equations equal to one another and solve for x:

</span>y = -3x + 2 = y = 2x + 7.  Then 5x = 5, and x=1.

Subst. 1 for x in y = 2x + 7, we get y = 2(1) + 7 = 9.

That results in the point of intersection (2,9).

Doing this problem by graphing, on a calculator, produces a different result:  (-1,5), which matches D.

I'd suggest you find and graph both lines yourself to verify this.  If you want, see whether you can find the mistake in my calculations.

3 0
3 years ago
Estimate the percent of the number 7% of 501​
Dmitry [639]

Answer:

35.7

Step-by-step explanation:

I typed percentage calculator, find a calculator, calculate it, find 35.7‍♀️

7 0
3 years ago
Other questions:
  • In bens office,there are 5 more women than man.Theres are 23 women.How many men are there
    6·2 answers
  • In what real-world situations would you want to round a number?
    14·1 answer
  • What is the value of c? inscribed angles (Image down below)
    13·1 answer
  • WHICH ANSWER IS CORRECT!!????
    6·1 answer
  • Can someone help me with this? (8x+5)+(−x 2−8)
    15·2 answers
  • What value of x makes this true? x/-7=-4.
    14·2 answers
  • 22% of _ peaches is 11 peaches
    6·1 answer
  • Help please fast the format is Y-____=_____(x - ____) and i need the actual answer
    15·1 answer
  • PLZ HELP
    11·1 answer
  • What is fhe solution of the system of these equations? (i’m giving brainliest)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!