• Shuffle
Toggle On
Toggle Off
• Alphabetize
Toggle On
Toggle Off
• Front First
Toggle On
Toggle Off
• Both Sides
Toggle On
Toggle Off
Toggle On
Toggle Off
Front

### How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

Play button

Play button

Progress

1/23

Click to flip

### 23 Cards in this Set

• Front
• Back
 RIGHT ANGLE This is an angle that forms a square corner. POLYGONS A polygon is a simple, closed figure with straight sides. The number of angles is the same as the number of sides. SIMILAR Figures that have the same shape but are different sizes. A POINT A point is an exact location in space. ANGLE An angle is formed by two rays that start at the same endpoint. They are measured in degrees using a protractor.The rays are the sides of the angle. The endpoint is its vertex. SPACE FIGURES They are three-dimensional geometric figures. they can have different numbers of flat surfaces called faces, and edges (lines), and vertices (angles). FLIP An imaginary line acts like a mirror for the figure. The figure is flipped like a page in a book. It can also be flipped to the left or up or down. A LINE A line is also a straight figure, but it has no endpoints CONGRUENT These are figures that are the same shape and size INTERSECTING LINES These are lines that cross each other. TURN Turn a figure around a point. The point acts like a pin when the figure is turned. The figure is turned around one of its corners. LINE SEGMENT It is a straight figure with two endpoints. LINE OF SYMMETRY The fold line on aplane figure is a line of symmetry. A RAY A ray is a straight figure. It has one endpoint. It goes on forever in just one direction. STRAIGHT ANGLE When two right angles are put together, they form a straight angle. It measures exactly 180 degrees. PARALLEL LINES These are lines in the same plane that never intersect. ACUTE ANGLE Less than 90 degrees A PLANE A plane is a flat surface that goes on and on in all directions. Shapes drawn on a plane are called plane figures. Plane figures can be open like an angle or closed like a circle or polygons OBTUSE ANGLE Greater than 90 degrees but less than 180 degrees. A REGULAR POLYGON A regular polygon has all sides the same length and all angles the same measure. PERPENDICULAR LINES These are intersecting lines that form right angles are called perpendicular lines SLIDE Geometric figures can move in special ways. You can slide a figure across a line. The figure looks the same but is in a different place on the paper. SYMMETRIC FIGURE A figure that can be folded so that its two parts match exactly.