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Step2247 [10]
3 years ago
8

How do you find the length of a line in a circle?​

Mathematics
1 answer:
GREYUIT [131]3 years ago
8 0

Answer:

How to calculate and derive the formula for the Chord Length of a circle. The formula for the chord length is: 2rsin(theta/2) where r is the radius of the circle and theta is the angle from the centre of the circle to the two points of the chord.

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3 years ago
The main cables of a suspension bridge are ideally parabolic. the cables over a bridge that is 400 feet logn are attached to tow
Novay_Z [31]
Consider the diagram of the problem.

Let the vertex be on the y axis, exactly, at the point (0, 40)

Another point of this parabola is (200, 100), as can be checked from the figure.

The vertex form of the equation of a parabola is :

y=a(x-h)^{2}+k, where (h, k) is the vertex of the parabola, 

replacing (h, k) with (0, 40), we have:

y=ax^{2}+40

to find a, we substitute (x, y) with (200, 100):

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So, the equation of the parabola is y= \frac{3}{2000} x^{2}+40

4 0
3 years ago
Write a word problem that would have the solution <br> p&lt;21<br> Lineunder neath the
Dimas [21]
The line underneath the inequality line(arrow) means p is less than OR EQUAL to 21.
An example off the top of my head would be, Rachel just started a new job that pays 7 dollars per hour. She only worked 3 hours and decided she wanted to go to the mall to buy some clothes. How much money does Rachel have to spend?
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5 0
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What is the order of the steps to solve for x in the equation 3x-6x-7=29
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x = -22/3 or -7.33
7 0
3 years ago
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1/3 (0.333,,,) is 0.05666... away from 0.39 .

2/5 (0.4) is 0.01 away .

3.8 (0.375) is 0.015 away .

9/25 (0.36) is 0.3 away .

2/5 is the closest one.
4 0
2 years ago
Read 2 more answers
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