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never [62]
3 years ago
6

Please help with geometry

Mathematics
1 answer:
Alexandra [31]3 years ago
4 0
The way to do this is to set up a 30 degree angle in a coordinate plane in the first quadrant.  I say the first quadrant since the first quadrant goes from 0 to 90 degrees and 30 falls right in that interval.  Using the positive x-axis as the initial ray of the 30 degree angle and the terminal ray of the angle as the hypotenuse of a right triangle, if we drop a height from the end of the terminal ray to the x-axis we have formed said right triangle.  The angle at the origin is the 30 degree angle.  According to the Pythagorean triple for a 30-60-90 triangle, the side across from the 30 degree angle measures 1, which is the height of our triangle.  The side across from the 60 degree angle is square root of 3, which is the base of our triangle, and the hypotenuse is 2.  The cos identity is the ratio that utilizes the side adjacent to the reference angle over the hypotenuse, which for us is \frac{ \sqrt{3} }{2}.    That's the third choice down.  Finding an "exact" value means that they want you to NOT express your answer in decimal form. 
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Twelve flags are evenly spaced around a running track. Ryan started running at the first flag and took 30 seconds to reach the s
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Answer:

Ryan takes 6n+36m -42 seconds to reach the nth flag for the mth time.

Step-by-step explanation:

It takes Ryan to run from 1st to 6th flag in 30 seconds, so it takes him

30 * 6/3 = 36 seconds to make one complete round.

or it takes 6 seconds to run from one flat to the next.

To reach the nth flag (n=1,2,3,4,5, or 6)

Ryan takes 6(n-1) seconds.

To reach it the mth times, he needs to add 36(m-1) seconds.

So time it takes Ryan to reach the nth flag for the mth time takes

6(n-1) + 36(m-1)

= 6n - 6 + 36m - 36

= 6n+36m -42 seconds

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3 years ago
Question 24
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Answer:

C = 250S + 4500

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What is the length of the hypotenuse? If necessary, round to the nearest tenth.
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Answer:

5.5

Step-by-step explanation:

The theorem used to solve this is axa+bxb=cxc. First you would do 4.9x4.9=24.01. Next you would do 2.4x2.4=5.76. Next you would add 24.01+5.76=29.77. Lastly you would square it and round if needed.

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Two ropes, AD and BD, are tied to a peg on the ground at point D. The other ends of the ropes are tied to points A and B on a fl
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Answer: 10 ft

Explanation

As two right triangles (a triangle with a 90º angle) are formed, to know the distance between AB we have to calculate BC, AC and subtract.

0. Calculating BC

We have a 30º angle and an adjacent side 5√3ft (as the hypotenuse is the side opposite to the 90º angle). Thus, using the tangent function where:

\tan\theta=\frac{opposite}{adjacent}

we can find the opposite side, which is BC. Replacing the values and simplifying we get:

\tan(30\degree)=\frac{BC}{5\sqrt{3}}BC=5\sqrt{3}\tan(30\degree)BC=5ft

Thus, the segment BC measures 5ft.

<em>2. Calculating segment AC</em>.

In this case, our hypotenuse changes. However, we are still looking for the opposite side. Using the tangent function as before we get:

AC=5\sqrt{3}\tan(60\degree)AC=15

<em>3. Calculating the distance between A and B</em>

AC-BC=15-5=10ft

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