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Question

In the figure given below, which of the pairs of triangles are congruent?(Assume that DE and FG are perpendicular bisectors of AX and AY respectively)

A
ABX and ACY
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B
ACR and YCR
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C
ABC and ACR
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D
ABQ and XBQ
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Solution

The correct options are
B ACR and YCR
D ABQ and XBQ

There are 2 pairs of congruent triangles in the given figure.

If we take XBQ and ABQ, we have

XQ = AQ (perpendicular bisector)

BQX = AQB = 90 (perpendicular bisector)

BQ = BQ (common side)

XBQ ABQ (By SAS Congruency)

Similarly, taking ACR and YCR, we have

AR = YR (perpendicular bisector)

ARC = YRC = 90 (perpendicular bisector)

CR = CR (common side)

ACR YCR (By SAS Congruency)


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