A note for the parent
What your child had to do in this Some Applications of Trigonometry problem
This was not a watch-and-copy exercise. The student had to make 3 small mathematical decisions and correct any wrong turns before moving forward.
The skill being built
Reasoning, not answer recognition
Model an angle of elevation from the observer eye line and distinguish the tangent-triangle height from total object height.
The mistake we watch for
A wrong answer is useful evidence
Using the entire object height as the opposite side ignores that the horizontal sight line begins at the observer eye level.
What happens when a step goes wrong?
The choice is crossed out
The app does not pretend the mistake did not happen.
The reason is explained
The child sees the exact misconception behind that choice.
The child tries again
The app guides, but the student still makes the next decision.
If this teaching style helps
Let your child keep learning this way
A free account saves progress and opens the complete learning path. There is no card requirement, and you can judge the experience before deciding anything.
14 days of full access · no credit card required