Coaching Centre
Chapter 7: Geometry: congruence and similarity Notes
Angle facts for parallel lines, triangles and polygons, properties of quadrilaterals, congruence tests and simple proofs, enlargement, and similar triangles with their applications.
Sections
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7A Angles, triangles and polygons Mastered
Angle relationships on parallel lines, triangle angle sum and exterior angle, isosceles triangles, polygon angle sums and quadrilateral properties, with reasons.
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7B Congruence and proofs Mastered
Congruence tests SSS, SAS, AAS and RHS, writing a congruence proof with reasons, and using congruent triangles to prove properties of shapes.
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7C Similar figures and similar triangles Mastered
Enlargement and scale factor, the four tests for similar triangles, matching sides and finding unknown lengths.
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7D Applying similar triangles Mastered
Proving triangles similar, nested triangles with a parallel side, and solving shadow and height problems.