standard_description: Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.
problem_activity: Tram knows that
$$1\frac{1}{6}$$
is less than
$$1\frac{2}{3}$$
. He wonders if this means that
$$-1\frac{1}{6}$$
is also less than
$$-1\frac{2}{3}$$
.
Help Tram determine and understand the correct order of
$$-1\frac{1}{6}$$
and
$$-1\frac{2}{3}$$
, from least to greatest.


aligns: no