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Ex 11.1
Ex 11.1, 2 Important Deleted for CBSE Board 2023 Exams
Ex 11.1, 3 (i) Deleted for CBSE Board 2023 Exams
Ex 11.1, 3 (ii) Important Deleted for CBSE Board 2023 Exams
Ex 11.1, 3 (iii) Important Deleted for CBSE Board 2023 Exams
Ex 11.1, 4 (i) Important Deleted for CBSE Board 2023 Exams
Ex 11.1, 4 (ii) Important Deleted for CBSE Board 2023 Exams
Ex 11.1, 4 (iii) Deleted for CBSE Board 2023 Exams
Ex 11.1, 5 Deleted for CBSE Board 2023 Exams You are here
Construct an angle of 120° using compass Deleted for CBSE Board 2023 Exams
Last updated at March 13, 2021 by Teachoo
Maths Crash Course - Live lectures + all videos + Real time Doubt solving!
Ex 11.1, 5 Construct an equilateral triangle, given its side and justify the construction.Let’s assume side of equilateral triangle is 5.5 cm In an equilateral triangle, all sides are equal So, our triangle looks like Let’s construct it Steps of construction 1. Draw a line segment AB of length 5.5 cm 2. Taking 5.5 cm as radius, and A as center, draw an arc. 3. Taking 5.5 cm as radius, and B as center, draw another arc. Let C be the point where the two arcs intersect Join AC and BC and label the sides Thus, Δ ABC is the required equilateral triangle Justification By construction, AB = AC = BC Since all sides are equal ∴ ∆ABC is an equilateral triangle. Thus, the Construction is justified. (Radius of equal arcs)