Question

Help me out with question 2 and 3 (geometry)

Answer 1

EF bisects AB. “Bisect” pretty much means splitting a line in half with another line. EF goes straight through the middle of AB, and forms a right, 90° angle, indicated by the square in the corner. (That square will always mean 90° angle.)

Answer 2

Here is question 3

3) A 90 degree algebra.