Stuck in Mathbook can you help?

[kebba99]

Hi guys could you plese help me with these questions

1.Prove that the triangle represents the square
2.Show that the area of a circle is half of (larger) half-circle area

thx in advance

 

[stapel]

1.Prove that the triangle represents the square

What do you mean by the triangle "representing" the square?

2.Show that the area of a circle is half of (larger) half-circle area

What are your thoughts? What have you tried? How far have you gotten? Where are you stuck?

Please be complete. Thank you!