"Hey, Nate, how's life?" I don't know, it's alright
I've been dealin' with some things like every human being
And really didn't sleep much last night (last night)
"I'm sorry", that's fine

In the rectangle below ac=30 units what is de

Evaluate cos2θ for cosθ = square root of 3/2

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap