In Fig. 6.35, ∆ ODC ~ ∆ OBA, ∠ BOC = 125° and ∠ CDO = 70°. Find ∠ DOC, ∠ DCO and ∠ OAB.

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TextAA Similarity Criterion for TrianglesVertically Opposite Angles

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In the given figure, ABCD is a quadrilateral. Diagonal BD bisects ∠B and ∠D both. Prove that :

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AA Similarity Criterion for Triangles

Basic Proportionality Theorem (Thales Theorem)

AA Similarity Criterion for Triangles

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