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Осевая симметрия 1
Author:
anna.kirs
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Parallelograms: Quick Investigation
Variation Theory Parallelogram Proofs
alg2_05_05_04_applet_exp_fxn_flvs
Explore the invariant lines of matrix {{-2,5},{6,-9}}
探究由平行線和截線所成的角
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Rebate de Ângulos na Circunferência Trigonométrica
Hole Puncher - Handle Press
perpendicular line : gracie bohon
Squares and Cubes: IM 6.1.17