Below there is a diagram of two triangles describe a sequence of Rigid motions the map triangle ABC to triangle DEF how do Reagan motions apply to the idea of triangle congruence explain why corresponding sides and angles of these triangle are congruent

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i think is 3 and 6. this took me 10 min to think.hope to and hope that my answer is brainliest.(follow me )

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).