Triangles

Triangles with same size means : Sides of one triangle are equal to sides of other triangle each to each. 1. 2. 3. The sum of the angles of a triangle is equal to two right angles i.e. 1800. Ifone side of a triangle is produced, the exterior angle so Jormed is equal to the sum of the two interior opposite angles. As shown, in triangle ABC, ................
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