CBSE Class 10 Sample Paper for 2020 Boards - Maths Standard

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Question 17 - CBSE Class 10 Sample Paper for 2020 Boards - Maths Standard - Solutions of Sample Papers for Class 10 Boards

Last updated at August 14, 2026 by

In the figure, if ∠ACB = ∠CDA, AC = 6 cm and AD = 3 cm, then find the length of AB

In the figure, if ∠ACB = ∠CDA, AC = 6 cm and AD = 3 cm, then find AB

Question 17 - CBSE Class 10 Sample Paper for 2020 Boards - Maths Standard - Part 2

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Question 17 In the figure, if ∠ACB = ∠CDA, AC = 6 cm and AD = 3 cm, then find the length of AB Given ∠ACB = ∠CDA In Δ ACB and Δ ADC ∠ACB = ∠ADC ∠CAB = ∠DAC ∴ Δ ACB ∼ Δ ADC We know that Sides of similar triangle are in same proportion ∴ 𝐴𝐶/𝐴𝐷 = 𝐴𝐵/𝐴𝐶 Putting values 6/3 = 𝐴𝐵/6 2 = 𝐴𝐵/6 2 × 6 = AB 12 = AB AB = 12 So, length of AB is 12 cm

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