An angle is how wide a door opens.
Drag the orange door, or tap − and +. The corner where the two sides meet is the hinge. Tap a button to jump to a special angle.
45°
Acute angle
Build Challenge 1 of 6
Drag the door to make the angle. Then press Check.
45°
Detective Case 1 of 8
Tip: tap the Square Corner button to compare with a perfect 90° corner.