Angles in triangles and quadrilaterals
Instructions
Start by estimating the size of each angle before clicking an angle to reveal its size.
When you get to the last angle, you should be able to calculate its exact size.
Note!
You can drag points around to adjust the angles, but to avoid overlapping/ negative angles, any points A-D must remain in alphabetical order as you go anticlockwise.
As you move points, angle lables may become separated from their angle markers. If this happens, you can drag the labels back towards their markers.