Understanding different types of angles and that angles in a triangle sum to 180° can be helpful when classifying a triangle. Recognising line symmetry and rotational symmetry will also help.

"It shouldn’t be that we have the second-highest electricity prices in the country." Controversial bill targets powerful ...

Or so we think. The disconnect is due to a lack of depth perception and such impossible objects can be demystified once viewed from a different angle. "Impossible objects" are revealed to be ...