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Question 1 - Constructing a triangle when 2 sides and angle between is known (SAS) - Practical Geometry
Last updated at July 27, 2026 by Teachoo
Constructing a triangle when 2 sides and angle between is known (SAS)
Practical Geometry
Concept wise
- Construction of line parallel to given line, through point not on line
- Constructing a triangle when 3 sides known (SSS)
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Constructing a triangle when 2 sides and angle between is known (SAS)
- Constructing a triangle when 2 angles and side between is known (ASA)
- Constructing a right triangle when hypotenuse and side is given (RHS)
Transcript
Question 1 Construct ∆DEF such that DE = 5 cm, DF = 3 cm and m∠EDF = 90°. First we draw a rough sketch To construct it, We follow these steps Steps of construction 1. Draw a line segment DF of length 3 cm 2. Now, we draw 90° from point D Check Ex 11.1, 1 of Chapter 11 Class 9 NCERT to see how to draw 90° 3. Taking D as center, 5 cm as radius, we draw an arc Let the point where arc intersects the ray be point E 4. Join EF and label the sides Thus, Δ DEF is the required triangle
