Triangles
151 CDS Mathematics previous year questions (PYQs) from 21 papers, 2016 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 23 easy · 98 moderate · 30 hard.
- Most-asked subtopics: The Altitude to the Hypotenuse (27), Pythagoras Theorem and its Converse (22), Parallels, Midpoints and the Bisector Theorem (17).
- Updated 20 September 2026.
#1Angles of a Triangle
- CDS · 2017 · CDS (I) 2017 — Elementary Mathematics · Q94ModerateHas image
#2Angles of a Triangle
#3Angles of a Triangle
#4Angles of a Triangle
#5Angles of a Triangle
Done a few? Here’s your next move
#6Angles of a Triangle
- Set · 1 questionFor the next ten (10) items that follow : Each item contains a Question followed by two Statements. Answer each item using the following instructions :
#7Angles of a Triangle
#8Angles of a Triangle
#9Angles of a Triangle
#10Angles of a Triangle
#11Angles of a Triangle
#12Triangle Inequalities
#13Triangle Inequalities
- Set · 2 questionsConsider the following for the next two (02) questions : In a triangle ABC, a, b and c are the lengths of the sides and p, q and r are the lengths of its medians.
#14Triangle Inequalities
#15Triangle Inequalities
#16Triangle Inequalities
#17Triangle Inequalities
#18Triangle Inequalities
#19Triangle Inequalities
#20Triangle Inequalities
#21Triangle Inequalities
#22Congruence and Similarity
#23Congruence and Similarity
#24Congruence and Similarity
#25Congruence and Similarity
- CDS · 2017 · CDS (I) 2017 — Elementary Mathematics · Q97ModerateHas image
#26Congruence and Similarity
- CDS · 2017 · CDS (I) 2017 — Elementary Mathematics · Q98ModerateHas image
#27Congruence and Similarity
#28Congruence and Similarity
#29Congruence and Similarity
#30Congruence and Similarity
#31Congruence and Similarity
#32Congruence and Similarity
- Set · 1 questionConsider the following for the next two (02) items that follow : Let two parallel line segments PQ = 5 cm and RS = 3 cm be perpendicular to a horizontal line AB, as shown in the figure given below. The point of intersection of PS and QR is M and MN is perpendicular to QS.
- CDS · 2024 · CDS (I) 2024 — Elementary Mathematics · Q81ModerateHas image
#33Congruence and Similarity
#34Congruence and Similarity
#35Parallels, Midpoints and the Bisector Theorem
#36Parallels, Midpoints and the Bisector Theorem
#37Parallels, Midpoints and the Bisector Theorem
#38Parallels, Midpoints and the Bisector Theorem
#39Parallels, Midpoints and the Bisector Theorem
#40Parallels, Midpoints and the Bisector Theorem
#41Parallels, Midpoints and the Bisector Theorem
#42Parallels, Midpoints and the Bisector Theorem
#43Parallels, Midpoints and the Bisector Theorem
#44Parallels, Midpoints and the Bisector Theorem
#45Parallels, Midpoints and the Bisector Theorem
#46Parallels, Midpoints and the Bisector Theorem
#47Parallels, Midpoints and the Bisector Theorem
#48Parallels, Midpoints and the Bisector Theorem
#49Parallels, Midpoints and the Bisector Theorem
#50Parallels, Midpoints and the Bisector Theorem
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