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lyudmila [28]
3 years ago
14

The diameter of a circle is 18 cm what is its area in terms of pi

Mathematics
1 answer:
NikAS [45]3 years ago
3 0

Answer:

A = 81π cm²

Step-by-step explanation:

The formula for area of a circle is A = πr², where r is the radius.  The radius is half the diameter, so our radius for this problem is

18/2 = 9.    So the area is..

A = π(9²) = π(81)

  A = 81π cm²

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The piney creek swim club is preparing for opening day. the pool holds 22,410 gallons of water and the water is being pumped in
andrew-mc [135]

Answer:

Yes,

Step-by-step explanation:

all you do is 540x42 which gives you 22680 and the pool only needs to be filled up with 22410, so yes

8 0
3 years ago
3+6×5+4÷2-7 using the same expression,add parentheses so that the value of the expression is 38​
solmaris [256]

Answer:

3+6×(5+4÷2)-7  

Step-by-step explanation:

To solve the expression use order of operations.

Right now the expression solves to:

3+6×5+4÷2-7                  6* 5 = 30

3 + 30 + 4÷2-7                4 ÷ 2 = 2

3 + 30 + 2 - 7                   Add and subtract left to right.

33 + 2 - 7

35 - 7

28

To make it solve to 38, add parenthesis:

3+6×(5+4÷2)-7                (5+4÷2) = 7

3+6×(7)-7                        6*7 = 42

3 + 42 - 7                        Add and subtract from left to right

45 - 7

38

7 0
3 years ago
What additional information will allow you to prove the triangles congruent by the HL Theorem?
marissa [1.9K]

Answer:

The correct option is 3.

Step-by-step explanation:

The HL theorem states that 'if the hypotenuse and one leg of a right triangle are congruent to the hypotenuse and one leg of another right triangle, then the triangles are congruent.'

From the given figure it is noticed that triangle ABC and triangle EDC. In triangle  ABC and triangle EDC, hypotenuses of triangles are AB and DE respectively.

To use HL hypotenuse and one leg of triangles must be equal.

AB=DE                             (hypotenuse)

AC=DC                             (leg)

BC=EC                              (leg)

Therefore the additional information  AC=DC  will allow you to prove the triangles congruent by the HL Theorem. Option 3 is correct.

8 0
3 years ago
Read 2 more answers
The diameter of the circle above is 34 in. What is the circumference of the circle?
gavmur [86]
Circumference formula is πd

C = (3.14)(34)
C = 106.76

Hope this helps :)
3 0
3 years ago
Help me<br> Verified and certified by me<br> -ayyyyyyy
spayn [35]

Answer:

c. 412.5 cm^2

Step-by-step explanation:

first triangle: 5 x 15 = 75

75/2 = 37.5

rectangle:  15 x 19 = 285

triangle 2: 15 x 12 = 180

180/2 = 90

37.5 + 285 + 90 = 412.5

3 0
2 years ago
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