Bob draws a line segment KL and draws a perpendicular line that intersects KL at M. He places the compass at M and draws an arc from L to K. He plots point R on the perpendicular line beyond the arc. What triangle did Bob construct with the points M, L, and R?

A right triangle because the measure of one angle is 90˚.

An obtuse triangle because one angle measures 90˚.

A right isosceles triangle because at least two sides are congruent.

An acute scalene triangle because all angles measure less than 90˚ and all sides are of different lengths.

Question

Bob draws a line segment KL and draws a perpendicular line that intersects KL at M. He places the compass at M and draws an arc from L to K. He plots point R on the perpendicular line beyond the arc. What triangle did Bob construct with the points M, L, and R? 

 A right triangle because the measure of one angle is 90˚. 

 An obtuse triangle because one angle measures 90˚. 

 A right isosceles triangle because at least two sides are congruent. 

 An acute scalene triangle because all angles measure less than 90˚ and all sides are of different lengths.