A perpendicular bisector is a line that divides another line segment into two equal parts at a right angle (90°).

Draw arcs from both endpoints. The intersection points form the line where the bisector is drawn.

Triangles are congruent if their corresponding sides and angles are equal.

Use a perpendicular bisector; any point on it is 90° to the line segment.

Construct a 90° angle and then bisect it.

An unmarked ruler and a compass are used for all constructions.

A regular polygon has all sides and angles equal.

Join 6 equilateral triangles to form a hexagon.

Mark two points, draw arcs, and connect their intersection for the bisector.

Tiling is covering a surface with shapes without gaps or overlaps.

The total number of squares must be even for complete coverage.

A tangram is a puzzle made from a square that is divided into 7 pieces.

Yes, it can be tiled in various configurations.

A 5x7 grid cannot be tiled with 2x1 tiles.

Draw an arc and measure its segments to create a congruent angle.

Use angle copying to ensure the same corresponding angles as the original line.

By overlapping two equilateral triangles.

Squares, equilateral triangles, and regular hexagons can tile the entire plane.