Determine if you have enough info to figure a side

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Discussion Overview

The discussion revolves around determining whether sufficient information is provided to solve geometry-related problems involving triangles and trigonometric ratios. Participants explore the conditions under which one can ascertain the lengths of sides in right triangles, particularly in the context of a ladder against a wall and a triangle defined by specific angles and a height.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Exploratory

Main Points Raised

  • One participant expresses uncertainty about how to begin solving the problems and determining if enough information is available.
  • Another participant provides a specific scenario involving a 15-foot ladder and the distance from the wall, indicating a range for 'a' (0
  • A later post questions whether the given information (a 90-degree angle, a 67-degree angle, and a height of 10'-0") is sufficient to find the length of side C, which represents the slope of the triangle.
  • Some participants assert that there is enough information to find side C and suggest using trigonometric ratios, specifically mentioning the tangent function.
  • One participant calculates a value for AB using the tangent of 67 degrees and provides a conversion to feet and inches, but invites corrections on their approach.

Areas of Agreement / Disagreement

There is no consensus on the initial participant's question about determining if there is enough information to solve the problems. While some participants agree that sufficient information exists for the second question, others have not yet responded to clarify or contest this view.

Contextual Notes

The discussion includes assumptions about the applicability of trigonometric ratios and the conditions under which they can be used, but these assumptions remain unverified and are not universally accepted among participants.

clhrhrklsr
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I have a couple of practice problems similar to ones I've seen before.

Could anyone tell me how to figure these? I don't even know where to begin on solving these. How do you begin to determine if you have enough information.

Thanks in advance for any help! View attachment 2802
 

Attachments

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No.
0<a<15

Suppose you have a 15 foot ladder to place against a wall. 'a' represents the distance of the base from the wall.
 
RLBrown said:
No.
0<a<15

Suppose you have a 15 foot ladder to place against a wall. 'a' represents the distance of the base from the wall.

Thanks! Okay, now the 2nd question on my attachment. Is there enough information given to find the length of side C? You are given a 90 degree angle, a 67 degree angle. You are also given a height of 10'-0". Side "C" is the slope of the triangle. Is there enough information given in this triangle to find side C?
 

clhrhrklsr said:
Thanks! Okay, now the 2nd question on my attachment. Is there enough information given to find the length of side C? You are given a 90 degree angle, a 67 degree angle. You are also given a height of 10'-0". Side "C" is the slope of the triangle. Is there enough information given in this triangle to find side C?

Yes there is. What trigonometric ratio do you think you will need to use?
 
Code:
Prove It said:


Yes there is. What trigonometric ratio do you think you will need to use?

Please correct me if I'm wrong.

\tan\left({67}\right) = \frac{AB}{BC}

AB = 10 x \tan\left({67}\right)

\tan\left({67}\right) = 23.5585

If you need to convert the decimal to feet and inches, you would get the following-

23.5585=23'-6\frac{11}{16}"
 
Last edited:

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