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  1. Chapter 10 Class 7 Practical Geometry
  2. Concept wise

Transcript

Constructing a Triangle when 2 sides, and 1 angle between them is known (SAS) Let’s take an example Draw a triangle Δ ABC, with AB = 3 cm, ∠ A = 30° and AC = 4 cm First we draw a rough sketch We follow these steps Steps of construction 1. Draw a line segment AB of length 3 cm 2. Now, we draw 30° from point A Check Ex 11.1, 3 (i) of Chapter 11 Class 9 NCERT to see how to draw 30° 3. Taking A as center, 4 cm as radius, we draw an arc Let the point where arc intersects the ray be point C 4. Join BC and label the sides Thus, Δ ABC is the required triangle

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.