you are standing on one side of the river. Figure out the width of the river. All calculations have to be made on the side you are standing on. You cant step into the river or cross it. You may use the 2 laws ( sine and cos ). no guessing allowed. has to be accurate. The calculation that are done should be done by someone who is in grade 10. you cannot use Similar and congruent triangles not allowed

Question

you are standing on one side of the river. Figure out the width of the river. All calculations have to be made on the side you are standing on. You cant step into the river or cross it. You may use the 2 laws ( sine and cos ). no guessing allowed. has to be accurate. The calculation that are done should be done by someone who is in grade 10. you cannot use Similar and congruent triangles not allowed

Answer 1

http://www.teachengineering.org/view_activity.php?url=http://www.teachengineering.org/collection/cub_/activities/cub_navigation/cub_navigation_lesson03_activity2.xml

Answer 2

this is just guessing the angle the mesasurment has to be accurate

Answer 3

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Answer 4

자동차 장기렌터카 장기리스 정보 모음입니다.

렌트카 중 그중에서 장기렌트카의 장점은
뭐니뭐니해도 지출증빙이 된다는 것이다. 지출증빙은 개인사업자,법인사업자
모두 가능한 것으로, 기존 개인 사업자와,
법인사업자들은 차량을 매입하여 세금과 사업용으로 공제받는 유류비 정도였지만, 렌트는 전액을 지출로 증빙을 받을 수 있어 세제 혜택이 조금 더 뛰어나다.

일반적으로는 차량을 구매하고 감가가 떨어져 중고차를 판매시 감가를
제외한 시세에 따라 중고차 가격이 정해지지만, 장기 렌트카의 경우 감가를 생각하고 탈 필요가 없어
차량 구매 후 중고차를 판매할때까지의 과정을 염두하지 않고 사용이 가능하기에, 장기렌트카는 일반적인 사업자들에게 인기가 많다고 한다.

장기렌트카.healthpeople.kr

Answer 5

To figure out the width of the river without physically stepping into it or crossing it, we can use a method known as triangulation. Here's how you can do it using the sine and cosine laws:

1. Find a point on your side of the river that has a clear line of sight to a point directly across the river. Let's call this point "A" on your side and "B" on the opposite side.

2. Measure the distance from your standing point (let's call it "C") to point A. Let's call this distance "a."

3. Measure the angle between the line of sight from your standing point to point A and a line perpendicular to the river (let's call this angle "A").

4. Measure the angle between the line connecting points A and B and a line perpendicular to the river (let's call this angle "C").

5. Using the sine law, we can set up the following ratio:
sin A / a = sin C / (width of the river)

6. Rearrange the equation to solve for the width of the river:
width of the river = a * sin C / sin A

7. Plug in the values you measured for a, A, and C, and use a scientific calculator to evaluate the equation. Make sure to use the same units for the angles (degrees or radians) as your calculator is set to.

By following these steps and using the sine and cosine laws, you should be able to calculate the width of the river accurately without stepping into it or crossing it.