If two lines are parallel, then _______ angles are equal, alternate, vertical, corresponding, supplementary, A geometric theorem must always have a _______., conclusion, diagram, proof, hypothesis, Side-angle-side (SAS) is a _______ rule for triangles, parallel, similarity, equality, congruence, In a triangle, three altitudes are concurrent at the _______., centroid, orthocentre, incenter, midpoint, A right triangular prism has parallel _______ edges., base, horizontal, vertical, lateral, In a triangle, three lines are concurrent if they meet at the _______ point., different, parallel, same, opposite

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