Key fact The sum of interior angles in a triangle is 180°. To prove a + b + c = 180 ∘, firstly draw a line parallel to one side of the triangle. d = b (alternate angles are equal) ...

Answer: None Sum of given angles = 47° + 70° + 85° = 202° ≠ 180°. Since the sum of all three angles is not equal to 180°. So, no triangle can be drawn with the given angles. 5.

Key fact The sum of interior angles in a triangle is 180°. To prove a + b + c = 180 ∘, firstly draw a line parallel to one side of the triangle. d = b (alternate angles are equal) ...