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PilotLPTM [1.2K]
3 years ago
10

Can someone pls help for brainlest

Mathematics
2 answers:
Lerok [7]3 years ago
8 0

Answer:

6.28km

Step-by-step explanation:

Hey,

We know that the circumfrence is the perimetert of a full circle. If we want to find the perimeter of a semicircle all we have to do is find the circumfrence and then divide it by 2 since we want to know the perimeter of half the circle.

Circumfrence is equal to 2πr. Where r is the radius and since we know the radius we an solve for the circumfrence.

2(π)(1km)=2kmπ.

The problem tells us to use 3.14 for pi so let's multiply 2 by 3.14.

6.28km is the answer!

worty [1.4K]3 years ago
6 0
What the guy above me said
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If the hypotenuse is c=a√2, then 6=a√2. In inches, what is the value of a?
Aloiza [94]

The value of a is 3√2 inches if it is given that the hypotenuse is c = a√2 and 6 = a√2. This can be obtained by using Pythagoras' theorem.

<h3>Calculate the value of a:</h3>

This question can be solved using Pythagoras' theorem,

If in a right angled triangle, hypotenuse is the longest side of the triangle and always opposite to the angle 90°, height and base are the two shorter sides which are adjacent to the angle 90°.

If hypotenuse = c, height = a and base = b then,

⇒ hypotenuse² = height² + base²

⇒ c² = a² + b²

Here in the question it is given that,

  • Hypotenuse of the triangle is c = a√2
  • 6 = a√2 in inches ⇒ c = 6
  • Height and base is equal and both has the value of a ⇒ height = a and base = a

By using the Pythagoras' theorem we can write that,

⇒ hypotenuse² = height² + base²

⇒  6² =  a² + a²

⇒  36 =  2a²

By dividing both sides of the equation by 2,

⇒  18 =  a²

⇒  a² = 18

By taking square on both side of the equation,

⇒ a = 3√2 inches

Hence the value of a is 3√2 inches if it is given that the hypotenuse is        c = a√2 and 6 = a√2.

Learn more about Pythagoras' theorem here:

brainly.com/question/9005379

#SPJ1

3 0
2 years ago
PLS HELP IVE BEEN ASKING FOR 3 1/2 DAYS IM ABOUT TO FAIL 7th GRADE ITS OVERDUE WILL GIVE BRAINLIEST IF YOU ANSWER THIS TYSM
Nataliya [291]

Answer:18 days

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What are the values of a, b, and c in the quadratic equation 0 = = x2 – 3x – 2?<br> a=1 h=30-2
jek_recluse [69]

Answer:

  • a = 1
  • b = -3
  • c = -2

Step-by-step explanation:

The general form of a quadratic equation is often written as ...

  ax² +bx +c = 0

The references to "a", "b", and "c" are to the coefficients in this form. Comparing this to your equation ...

  x²-3x -2 = 0

we see that the coefficient of x², is 1, so a=1; the coefficient of x is -3, so b=-3, and the constant is -2, so c=-2.

7 0
4 years ago
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prohojiy [21]

Answer:

y = -2/3x + 1

Step-by-step explanation:

Put -2/3x + 1 into y= on the graphing calculator and the point (6,-3) is in the table.

6 0
3 years ago
How do I solve this problem?
Ivan
Cross multiply and turn the mixed number into a fraction
6 0
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