Adding Angles: The Sprinkle Bakery

At the Sprinkle Bakery, Chef Rosie fits slices of cake together, point to point, with no gaps. When two angles share a side and don’t overlap, the big angle they make together is the two angles added up.

Remember: Angles that share a side add up: a 30° angle next to a 60° angle makes 30° + 60° = 90°. To find a missing part, subtract: if the whole is 90° and one part is 40°, the other part is 90° − 40° = 50°. A whole round cake goes all the way round: 360°.

Magic trick: Angles are like slices of cake: put the slices back together and their angles add up to the angle of the whole piece.