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
Please answer this correctly for a brainliest ☺️
Dimas [21]
Hello I think the answer would be three.
5 0
3 years ago
At the market 7 apples cost 4.55 how much would 9 apples cost
I am Lyosha [343]
Your answer is 22.09. I hope you get right
3 0
3 years ago
describe the mathematical order of operations. if you use an acronym for your description, make sure you define what each letter
MrMuchimi
PEMDAS

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
3 0
3 years ago
Read 2 more answers
What is 90% of 50?<br> Show all work
Natali [406]
First find out what 10 percent of 50 is
Do 50/10
I got 5
Then do 5 times 9 to get your answer
You should get 45. Thanks (:
8 0
3 years ago
Read 2 more answers
A rectangle tank is 21cm long,13 cm wide and 18cm high and contains water up to a height of 11cm theb the volume of water in lit
Zolol [24]

Answer:

3003 cm³

Step-by-step explanation:

21cm × 13cm × 11 cm = 3003 cm³

6 0
2 years ago
Other questions:
  • ∠1 ​ and ∠2 are supplementary. ∠1=124°∠2=(2x+4)° Select from the drop down menu to correctly answer the question.
    14·1 answer
  • Write "twenty-four and seventy thousandths" using base-ten numerals.
    14·1 answer
  • Can anyone help with this?
    11·1 answer
  • Find the distance between the two points in simplest radical form HELP​
    10·1 answer
  • Question 65 pts Which statement about signal phrases is true? (5 points) Group of answer choices Signal phrases should be worded
    10·1 answer
  • If a triangle has a 50 degree angle and a 68 degree angle, how many degrees is the third angle
    15·1 answer
  • Arrange the numbers in order from least to greatest.
    9·1 answer
  • What is the speed of a car that traveled a total of 90 km in 2 hours
    5·1 answer
  • The graph below shows the #tal distance, in miles, traveled by a towboat over time,
    9·1 answer
  • tim spent 1/4 of his savings on a gift. He spent $24.How much money did he have in his savings before buying the gift? Let s rep
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!