2.1 Define, sketch, and label points, lines, planes, segments, rays, and angles.
2.2 Define and identify collinear points, coplanar objects, and intersections of lines and planes.
2.3 Distinguish between equality and congruence.
2.4 Use the segment addition postulate to find missing lengths given a numeric value or algebraic expression.
2.5 Using the Pythagorean Theorem, derive the distance formula and use this formula to find the distance between two points.
2.6 Use the ruler postulate to define the mid-point formula and use this formula to find the mid-point of a line segment.
2.7 Find the endpoint of a segment given an endpoint and the midpoint.
2.8 Define, identify, and label adjacent, vertical, complementary, and supplementary angles and linear pairs anduse them to find missing measurements given a numeric value or algebraic expression.
2.9 Use angle relationships to find missing angle measures given a numeric value or algebraic expression.
2.10 Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle.