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Class 10 Mathematics — Chapter 6: Triangles

67 practice questions · 22 Easy · 23 Medium · 22 Hard

Free NCERT-aligned multiple-choice practice for Class 10 Mathematics, Chapter 6 (Triangles). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 67.

Sample questions

Q1Easy

Two triangles are similar if:

A.Their corresponding angles are equal and corresponding sides are proportional✓ correct
B.Their corresponding sides are equal
C.Their areas are equal
D.They are congruent only
Why

AAA: equal angles + proportional sides ⇒ similar.

Q2Medium

In two similar triangles, ratio of areas is 16 : 25. Ratio of their corresponding sides is:

A.4 : 5✓ correct
B.16 : 25
C.2 : 5
D.4 : 25
Why

Side ratio = √(area ratio) = √(16/25) = 4/5.

Q3Hard

ABC is a right triangle at A. If AD is the altitude to BC, with AB = 3 cm and AC = 4 cm, then AD equals:

A.12/5 cm✓ correct
B.5/2 cm
C.2 cm
D.6/5 cm
Why

BC = 5. Area = (1/2)(3)(4) = 6. Also = (1/2)(5)(AD) ⇒ AD = 12/5.

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