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Question

During the construction of a triangle given its base, a base angle and the sum of other two sides, which of the triangles formed are congruent?​


A
ABC & AMC
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B
ABC & ADC
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C
ABC & AMD
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D
AMC & AMD
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Solution

The correct option is D AMC & AMD
Given, Construction of a triangle given its base, a base angle and sum of other two sides. ​

If we take AMC and AMD, ​

DM = MC (perpendicular bisector bisects the line DC) ​

AMC = AMD = 90° (perpendicular bisector) ​

AM = AM (common side) ​

AMC ≅ AMD (By SAS Congruency) ​


Answer: (D) AMC and AMD

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