Ex 6.3, 1 (iv)
State which pairs of triangles in figure are similar. Write the similarity criterion used by you for answering the question and also write the pairs of similar triangles in the symbolic form
In β πππΏ and βπππ
β π = β π =70Β°
Also,
ππ/ππ=2.5/5 = 25/(5 Γ10)=1/2
ππΏ/ππ =5/10=1/2
So, ππ/ππ=ππΏ/ππ =1/2
Hence, by SAS similarity criterion for two triangles
β πππΏβΌβπππ
Ex 6.3, 1(v)
State which pairs of triangles in figure are similar. Write the similarity criterion used by you for answering the question and also write the pairs of similar triangles in the symbolic form
In β π΄πΆπ΅ and β πΉπ·πΈ
β A = β F = 80Β°
π΄π΅/πΉπ·=2.5/5 = 25/(5 Γ10) =1/2
π΄πΆ/πΉπΈ=π΄πΆ/6
AC is not given
So, π΄π΅/π·πΉ β π΄πΆ/πΈπΉ
So , β π΄πΆπ΅ and β πΉπ·πΈ are not similar .

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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