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, 12:22, 16 January 2018
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==== 8. Similar Triangles ====
==== 8. Similar Triangles ====
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[https://www.geogebra.org/m/GhGtuvV7 Similar triangles]
==== 9. Tangents and Secants to a Circle ====
==== 9. Tangents and Secants to a Circle ====