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Keith_Richards [23]
3 years ago
11

Here is quite a simple question. How do you work out the area of a circle?

Mathematics
2 answers:
Tomtit [17]3 years ago
7 0
A=\pi r^2 where r is the radius of a circle.
Usimov [2.4K]3 years ago
5 0
<span><span>The area of a circle is π (pi) times the Radius squared, which is written: A = π × r2</span></span>
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Susan is 5 years older than her sister. The sum of their ages are 51. Define a variable. Then write an equation that could be us
Kay [80]
You would do
51-5= 46 
then you would divide 
46/2= 23
so Susan is 
23+5=28
Susan is 28 years old and her sister is 23
28+23=51
5 0
3 years ago
Read 2 more answers
If each unit cube has edges of length 1/2 foot what is the volume of the blue outlined prism
postnew [5]

Answer:

The answer is 2.5

Step-by-step explanation:

each cube has a volume of 0.125 and the cube can hold 20 of them.

0.125 * 20 = 2.5

4 0
3 years ago
Read 2 more answers
if a car drives 80 miles in 1 hours how many miles will the car travel in 30 minutes at this rate? how many miles will it travel
eimsori [14]
40 miles in 30 minutes, 60 miles in 45 minutes

divide 80 by 60 (mins in a hour) then multiply that’s by the number of minutes (30,45)
4 0
3 years ago
writing and reasoning. write the number 34 and the number 43 as tens plus ones. how are they different?
defon

34 is 3 tens and 4 ones whereas 43 is 4 tens and 3 ones they are different because they have different values.

7 0
3 years ago
Someone, please help me lol I'm small brain
Eddi Din [679]

Answer:

Measure of EF: 1.98

Measure of AB: 6.16

Measure of HI: 12.2

Step-by-step explanation:

Trick I learned that's very helpful when solving these problems: SOH (Sine, Opposite, Hypotenuse)- CAH (Cosine, Adjacent, Hypotenuse)- TOA (Tangent, Opposite, Adjacent)

MEASURE OF EF

you're starting with angle D which is 26 degrees. You have the measure of the Hypotenuse (DF) and you're trying to find the measure of EF (the segment opposite the angle) so you would use Sine

to do the equation, i'm going to use x in place of EF. 0.44 = sin(26)

Formula: sin(angle) = (opposite)/(hypotenuse)

Equation:

0.44 = x/4.5       <----------- multiply by 4.5 to get x by itself

4.5*0.44 = x       <---------- 4.5 times 0.44

1.98= x       <----------------answer

MEASURE OF AB

trying to find hypotenuse and you already have the adjacent angle so you would use cosine. Using y in place of AB. 0.616 = sin(52)

cos(angle) = (adjacent)/(hypotenuse)

cos(52) = 10/y      <------ divide by y

y*0.616 = 10       <------------ divide by 0.616

y = 10/0.616    <----------- next you'll divide 10 by 0.616

y = 6.16    <-----------answer

MEASURE OF HI

trying to find adjacent, already have opposite so you would use tangent. tan(42) = 0.90. using z in place of HI

tan(angle) = (opposite)/(adjacent)

tan(42) = 11/z   <------------ multiply z on both sides

z*0.90 = 11  <--------- divide by 0.90 to get z by itself

z = 11/0.90    <-------- divide 11 by 0.90

z = 12.2

4 0
2 years ago
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