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

Transcript

Constructing a Triangle when all 3 sides are known (SSS) Let’s take an example Draw a triangle with lengths 3 cm, 4 cm, 5 cm First we draw a rough sketch We follow these steps Steps of construction 1. Draw a line segment BC of length 5 cm 2. Since length of AB is 4 cm, we measure 4 cm using ruler and compass 3. Now, putting pointed end on point B and compass opened the same length, we draw an arc 4. Since length of AC is 3 cm, we measure 3 cm using ruler and compass 5. Now, putting pointed end on point C and compass opened the same length, we draw an arc 6. Where the arcs intersect, mark it as point A Join AB and AC 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.