Question 8
If in two triangles DEF and PQR, ∠ D = ∠ Q and ∠ R = ∠ E, then which of the following is not true?
(A) EF/PR = DF/PQ (B) DE/P𝑄 = EF/RP
(C) DE/QR = DF/PQ (D) EF/RP = D𝐸/QR
Our triangles look like
∴ Δ DEF ~ Δ QRP
Now,
𝐸𝐹/𝑃𝑅=𝐷𝐹/𝑃𝑄
So, (a) is true
Also,
𝐷𝐸/𝑄𝑅=𝐷𝐹/𝑃𝑄
So, (c) is true
And,
EF/RP=𝐷𝐸/𝑄𝑅
So, (d) is true
Thus, only (b) is not true
So, the correct answer is (B)

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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