Brainlag PlusThe exterior angle of a triangle, the angle sum of a quadrilateral, and the properties of the special quadrilaterals.
Exterior angles and quadrilaterals
- The exterior angle of a triangle equals the sum of the two interior angles opposite it.
- Angles in a quadrilateral add up to 360° (two triangles).
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 2, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards