triangle abd right angled showing angles equal proving equals |
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| navigate by keyword : triangle abd rightangled equalangles hypotenuse perpendicular congruence diagram geometry euclidean plane proof prove point segment line isosceles anglechasing theorem construction educational mathematics math geometric figure labeled markings arcmarks vertex problem exercise reasoning symbols steps solution relation |
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| Triangle ABD right-angled at A showing C on BD, C,D angles equal proving AC equals AD. Geometry, euclidean, plane, hypotenuse, perpendicular, congruence, diagram |
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