2 years ago

The perimeter of a circle=πr², where π=22/7. find the area of r=21cm

Mathematics

1 answer:

Serjik [45]2 years ago

7 0

EXPLAINATION: $\pi r^2=\frac{22}{7} .21^2=\frac{22}{7} .441=\frac{22.441}{7} =\frac{22.63.7}{7} =22.63=1386$

ANSWER: 1386 $cm^2$

Ok done. Thank to me :>

You might be interested in

taurus [48]

Answer:

6 feet

Step-by-step explanation:

Since there are 8 bricks and each brick is 9 inches long, that is a total of 72 inches. Now, you need to convert it from inches to feet. Since 1 foot is 12 inches, we need to divide 72 by 12 to get the number of feet. 72 / 12 is equal to 6.

6 0

2 years ago

A baby snake is 1 ¾ feet long. Its mother is 4 ½ feet long. How many times as long is the baby snake as the mother snake?

arlik [135]

Answer:

2.75

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

What is the surface area of the square pyramid represented by the net?

Dimas [21]

Answer:

<h2>7,938 Is the Area, do you need the perimiter?</h2>

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Cory predicts it will take him 64 minutes to travel to Baltimore from Washington D.C. If the trip actually took 74 minutes, what

n200080 [17]

Answer:13.5

Step-by-step explanation:

the answer is 13.5

6 0

2 years ago

Helpppp meeeee please

lawyer [7]

Answer:

?= 35.66º

Step-by-step explanation:

26/32=0.8125

cos 35.66º=0.8125

7 0

1 year ago

Read 2 more answers

The perimeter of a circle=πr², where π=22/7. find the area of r=21cm ​

The perimeter of a circle=πr², where π=22/7. find the area of r=21cm