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Chapter 3 : Perpendicular and Parallel Lines
Games

To play, click on the desired block with your mouse, or move the cursor with your ARROW KEYS. When the block is highlighted, type your letter. To switch from across to down or vice versa use the ARROW KEYS or Control-CLICK with your mouse. To clear the puzzle, click on your browser's REFRESH or RELOAD button. After clicking "Check Answers", incorrect letters will be marked with an "X". Your teacher has access to the completed puzzle.

 Across 1. Two lines that intersect to form a right angle are ________. 3. A type of proof written as numbered statements and reasons that show the logical order of an argument. 5. Two lines that do not intersect and are not coplanar. 9. ________ angles are two angles that are formed by two lines and a transversal and occupy corresponding positions. 10. Two adjacent angles whose noncommon sides are opposite rays. 11. Alternate ________ angles are two angles that are formed by two lines and a transversal and that lie outside the two lines on opposite sides if the transversal. Down 2. The sum of the measures of an angle and its ________ is 90°. 4. ________ interior angles are two angles that are formed by two lines and a transversal and that lie between the two lines on the same side of the transversal. 5. The sum of the measures of an angle and its ________ is 180°. 6. Consecutive interior angles are also called ________ interior angles. 7. A type of proof that uses arrows to show the flow of a logical argument. Statements are connected by arrows to show how each statement comes from the ones before it, and each reason is written below the statement it justifies. 8. Alternate ________ angles are two angles that are formed by two lines and a transversal and that lie between the two lines on opposite sides of the transversal.