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Constructing Triangle when 2 Angles and the Included Side are given
Last updated at November 7, 2025 by Teachoo
Constructing Triangle when 2 Angles and the Included Side are given
Class 7 (Ganita Prakash 1, 2 & old NCERT)
Chapter 7 Class 7 - A tale of three Intersecting Lines (Ganit Prakash)
- Definition
- Constructing Equilateral Triangle
- Constructing a Triangle when its Sides are given
- Figure it out - Page 150, 151
- Are Triangles Possible for any Lengths?
- Figure it out - Page 154
- Visualising the Construction of Circles
- Figure it out - Page 156
- Triangle Inequality & Construction of Circles
- Figure it out - Page 159
- Constructing Triangle when 2 Sides and the Included Angle are given
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Constructing Triangle when 2 Angles and the Included Side are given
- Do triangles always exist?
- Sum of angles of a triangle
- Angle Sum Property
- Exterior Angles
- Constructions Related to Altitudes of Triangles
- Figure it out - Page 170, 171
Transcript
Constructing Triangle when 2 Angles and the Included Side are givenWhen we say two angles and an included side are given, we mean Two anles of triangle And, side between these angles is given Example Let’s do a question Construct a triangle ABC where AB = 5 cm, ∠ A = 45° and ∠ B = 80°. First, we draw a rough figure We take the side as base ∴ AB is base Now, let’s construct it Steps of construction 1. Draw a line segment AB of length 5 cm 2. Since ∠ A = 45° Using protractor, we draw 45° from point A Note: We read the blue mark on protractor 2. Since ∠ B = 80° Using protractor, we draw 80° from point B Note: We read the black mark on protractor 4. The intersection point is Point C. We label the sides Thus, Δ ABC is the required triangle
