Worked Example
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.
Step-by-step solution path
- Read the topic idea: Exterior Angle Property.
- Recall the core explanation from the chapter: Properties of triangles, angle sum, exterior angles and Pythagoras theorem.
- Use the related formula "Angle sum in triangle" as the main tool while solving.
- Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on Exterior Angle Property. A strong solution should identify the correct data, apply Angle sum in triangle, and explain each transition instead of jumping directly to the answer.
Related formula
Angle sum in triangle
∠A + ∠B + ∠C = 180°