Question

if all sides of a triangle are congruent then its all angles are congruent. Write the proof of this corollary.

Answer 1

if all sides of a triangle are congruent then its all angles are congruent..

By Side side side criteria..
Let in , ∆ABC and ∆DEF..
AB=DE
BC=EF
AC=DF

By SSS ∆ABC and ∆DEF will be congruent .. and
By CPCT all angles will be congruent..

it will be congruent proof

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hope this will help you..