Distinguish a point, line, line segment, and ray in a diagram, then name each one with the usual endpoint and order rules. You’ll trace intersections, collinear points, “between” relationships, and parallel or perpendicular markings so a written statement matches the drawing.

Treat distance as a number with units, not the segment itself. You’ll read and write lengths such as AB, compare measured segments, and use midpoint language when a point splits a segment into two equal parts.

Use the definition of a circle as all points a fixed distance from one center. You’ll identify and name the center, radii, diameters, chords, arcs, and points inside, on, or outside the circle, including why every radius of the same circle has the same length.

Apply the previous explanations in a guided problem.

Name a triangle from its three vertices and connect each side length to the correct pair of points. You’ll read side labels, equal-side marks, perimeter facts, and the triangle inequality without relying on how the sketch happens to look.

Make clean, readable geometry diagrams from short descriptions by placing labels, length marks, unknowns, and units where they belong. You’ll also decide which facts are guaranteed by markings or words and which are only visual guesses from an imperfect sketch.

Apply the previous explanations in a guided problem.

Check your understanding with a short quiz.

Review this chapter with practice based on your mistakes.