Glenn Fleishman @GlennF:
Shoot. Ben asked me to draw some quadrangles to calculate area. Now we discover you need trig for that. He’s only doing 5th grade math.

@GlennF Don’t need trig if 2 sides are parallel and is symmetrical. I think.

Glenn Fleishman @GlennF:
@jeffporten Exactly. But for any trapezoid!

@GlennF You’re screwed if you can’t make pretty right triangles.