Geometry – Grade 10 CBSE

There are couple of topics covered in this section:

1. Circles
2. Triangles

Click on each topic to know more details.

Circles
Key topics include:

  • Basic Definitions
    • Circle
    • Chord
    • Congruent Chords
    • Segment
    • Major, Minor & Semi Circle Segment
    • Arcs
    • Major and Minor Arcs
    • Sector
    • Major & Minor Sectors
    • Secant
    • Tangent
    • Point of Contact
    • Number of Tangents to a Circle
  • Theorems on Tangents

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Triangles
Key topics include:

  • Introduction
    • Congruent Figures
    • Similar Figure
    • Similar Polygon
  • Thales’s Theorem
    • Thales Theorem (Theorem 1)
    • Converse of Thale’s Theorem (Theorem 2)
  • Mid Point Theorem
    • Mid Point Theorem (Theorem 3)
  • Angle Bisector Theorem
    • Angle Bisector Theorem (Theorem 4)
  • Criteria for Similarity of Two Triangles
    • AAA Similarity (Theorem 1)
    • SSS Similarity (Theorem 2)
    • SAS Similarity (Theorem 3)
    • Altitude Division of a Right Angled Triangle (Theorem 4)
    • Altitude Property (Theorem 5)
    • Median Property (Theorem 6)
    • Theorem 7 : Angle Bisector Property
  • Ratio of the Areas of Two Similar Triangles
    • Sides Property (Theorem 1)
  • Pythagoras Theorem
    • Pythagoras Theorem (Theorem 1)
    • Converse of Pythagoras Theorem (Theorem 2)
  • Projection Theorem
  • Apollonuis Theorem

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