Sandy is constructing a triangle LMN congruent to triangle PQR.
he constructed a segment LN congruent to side PR. She then measured side QR with a ruler and constructed a segment of the same length above and toward the right side of segment LN from point N. What error did Sandy make in this step?

Question

Sandy is constructing a triangle LMN congruent to triangle PQR.
he constructed a segment LN congruent to side PR. She then measured side QR with a ruler and constructed a segment of the same length above and toward the right side of segment LN from point N. What error did Sandy make in this step?

anonymous · Answer

rawing the segment from point N instead of R
drawing a segment with a ruler instead of an arc with the compass
drawing a segment above segment LN instead of marking a point M
drawing the segment toward the left of segment LN intead of toward the right

anonymous · Answer

Can't see your picture.  A congruent triangle requires not only equal sides, but equal angles.  Since she has only drawn 2 sides, how does she know that the angle she drew between them is correct?

She doesn't.  Therefore it would be wiser to use a compass and draw a circle of length QR, so that every possible angle is covered.

The last step would be to use a compass to draw the last side's possible angles from point L.  The intersection of the two circles is where point M will be, and now you can draw the lines connecting them.