There seems to be an error in Geometry Foundation Quiz #1 Q15. The side length opposite the 30 degree angle in the right triangle formed to find the height of the rhombus cannot be 2 root 3; it must be 2 because sin (30) = x/4 –> 1/2 = x/4 –> 2 = x. Thus, the answer for the question is 4*2=8. I believe the shown solution would be correct if the given exterior angle was 120 degrees rather than 150.
This was noted below the video.
Not in the solutions video linked within the quiz. And why is the incorrect question still in the quiz anyway?
Apologies, I made a mistake there. For this question, Greg corrected his mistake later on. Clearly a lot of people don’t seem to go that far, so something will need to be done.