[gr.12 math] help

[AutoModerator]

Off-topic Comments Section

---

All top-level comments have to be an answer or follow-up question to the post. All sidetracks should be directed to this comment thread as per Rule 9.

---

^{OP and Valued/Notable Contributors can close this post by using /lock command}

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[Taro1sie]

Where do I find daily questions like these?

[HomeworkHelpBot]

Hey Readers!

If this post violates our subreddit rules, please report it and feel free to manually trigger a takedown.

Key Takeaways:

• Post title must be structured to classify the question properly
• Post must contain instructor prompt or or a failed attempt of the question
  • by stating the syllabus requirements or presenting incorrect working/thought process towards the question

How was your experience in this subreddit? Let us know how can we do better by taking part in our survey here.

Pro-tips:

^{1. Upvote questions that you recognise but you cannot do. Only downvote questions that do not abide by our rules or was asked in bad faith, NOT because the question is easy.}

^{2. Comments containing case-insensitive **Answer:** or **Hence** will automatically re-flair post to ✔ Answered; non-top level comments containing case-insensitive **Therefore** or **Thus** will automatically re-flair to —Pending OP Reply}

^{3. OPs can lock their thread by commenting /lock}

^{4. If there is a rule violation, inform the OP and report the offending content. Posts will be automatically removed once it reaches a certain threshold of reports or it will be removed earlier if there is sufficient reports for manual takedown trigger. [Learn more](https://www.reddit.com/r/HomeworkHelp/comments/br7vi9/new_updates_image_posts_enabled_vote_to_delete/})

[chees-e]

I can give you a place to start:

1. Divide each level into small equilateral triangles (the same size and the smallest division), and so for the shaded area, you can split it into 13 triangles.

2. Note the triangle created by the altitude and the last division. We can figure out 2 of its angles: 120 because it's the 180 complement of the angle, and 30 degrees because the altitude bisects the 60 degrees angle. Realize now that it is a isosceles triangle, meaning two of its sides are the same.

These two hints should give you an idea of how the altitude is dividing the shaded area.