Class 7MathematicsTriangles and Its Properties
Exterior Angle Property
Exterior angle of a triangle = sum of the two non-adjacent interior angles. If exterior angle is ∠ACD, then ∠ACD = ∠A + ∠B. This is because exterior angle + interior angle = 180° (straight line), and sum of all three interior angles = 180°.
10 examples
Concept check 1
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on concept check and show the working clearly.
Definition to application 2
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 7 Mathematics, explain or solve a exterior angle property question from the chapter "Triangles and Its Properties". Focus on exam recap and show the working clearly.