Triangles
Your child will prove and apply similarity with the rigour board geometry demands. Triangles generally account for about seven marks, frequently a five-mark proof of a similarity result or Pythagoras alongside short application questions. The chapter defines similar figures, establishes the angle-angle-angle, side-side-side and side-angle-side criteria, proves that areas of similar triangles sit in the ratio of squares of matching sides, and proves the Pythagoras theorem with its converse. Shadows, ladders, poles and maps supply the applications. Three confusions persist. Learners quote the an
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