Attention Math

Class 10 · Chapter 6 · Geometry

Triangles

Similar triangles: same shape, any size, and the ratios that prove it.

Source: NCERT Mathematics, Class 10

  1. 6.1Same Shape, Any SizeAttention · Look at the ratios of corresponding sides, not whether sides are equal.8 min
  2. 6.2The Basic Proportionality TheoremAttention · Look at the pieces of the two cut sides: top against bottom.10 min
  3. 6.3Similarity from Angles (AA)Attention · Look at the angles. Two matching pairs settle similarity.8 min
  4. 6.4Reading the CorrespondenceAttention · Look at the order of the letters in the similarity statement.8 min

Problems

The clue is in the question

All 1 problem
  1. 1A line parallel to the baseIn △ABC, DE || BC with D on AB and E on AC. AD = 2 cm and DB = 3 cm, and DE = 4 cm. Find BC.Lens · The known factPractice (NCERT style)