{"type":"rich","version":"1.0","description":"Derive the formula A = 1/2 ab sin(C) for the area of a triangle by drawing an auxiliary perpendicular line from a vertex. (HSG.SRT.D.9)","title":"Deriving the Area of a Triangle","width":720,"html":"<iframe src=\"https://arcade.padlet.com/embed/RVjBBnGDjJ\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","height":480,"provider_name":"Padlet Arcade","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1785282875835&hashid=RVjBBnGDjJ","provider_url":"https://arcade.padlet.com"}