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3 years ago

What is the area of a circle that has the diameter of 4?

Mathematics

2 answers:

OverLord2011 [107]3 years ago

7 0

The answer to this question is A≈12.57

Vikentia [17]3 years ago

3 0

Answer:

Hello! answer: 12.56

Step-by-step explanation:

Area for circles is found be doing

radius × radius × pi since we arent given radius we have to figure it out. But what we do know it diameter is just 2 times the radius so to undo that to find our radius we just do 4 ÷ 2 and 4 ÷ 2 = 2 so 2 is our radius now we will square it which is just fancy for multiply is by itself so 2 × 2 = 4

4 × 3.14 = 12.56 So 12.56 is our area! Hope this helps you!

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What is the length of MN <br><br><br> PLZ HELP

leva [86]

The answer is 5 because you take away an x for 3x to get 2x so 2x=10
Then divide the 10 by 2 to get x=5

4 0

3 years ago

I DON'T UNDERSTAND THIS SOMEONE HELP!!

trasher [3.6K]

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6 0

3 years ago

Special right triangles

natali 33 [55]

Answer:

x=14.4

Step-by-step explanation:

We apply the Sine Rule to solve for x:

#We first determine the acute angles of the larger right angles.

$\frac{a}{Sin \ A}=\frac{b}{Sin \ B}=\frac{c}{Sin \ C}\\\\\frac{30}{Sin \ 90\textdegree}=\frac{24}{Sin \ A\textdegree}\\\\A=53.13\textdegree$

The smaller right angles shares one acute angle of 53.13°.

Therefore the x can be solved applying the Sine Rule again:

$\frac{x}{Sin \ 53.13\textdegree}=\frac{18}{Sin \ 90\textdegree}\\\\x=14.4$

Hence, the length of x is 14.4

7 0

4 years ago

): If (6x-3)(6x+3)=ax^2-b, what is the value of a? What is the value of b?

lesantik [10]

Answer: a = 36 and b = 9

Explanation:

(6x-3)(6x+3)

= 36x² - 18x - 18x - 9

= 36x² - 9

(6x-3)(6x+3) = ax² - b

36x² - 9 = ax² - b

a = 36 and b = 9

Hope it helps!

7 0

3 years ago

Please help me I’m so lost

bearhunter [10]

Answer:

128

Step-by-step explanation:

Side a

11.314

Area

128

cm²

Diagonal

Perimeter

45.255

7 0

4 years ago

Read 2 more answers