Question

# Which congruence criterion do you use in the following?Given AC$$=$$DF, AB$$=$$DE, BC$$=$$EF, so $$\Delta$$ABC$$\cong\Delta$$DEF.

Solution

## By SSS congruence criterion, since it is given that AC$$=$$DF, AB$$=$$DE, BC$$=$$EF. The three sides of one triangle are equal to the three corresponding sides of another triangle.Therefore, $$\Delta$$ABC$$\cong\Delta$$DEF.MathematicsNCERTStandard VII

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