# Chapter 11 Math Vocabulary

## 21 terms · Made By Saphal Narang

A closed figure having four sides and four angles.

### Supplementary Angles

Two angles that are this if the sum of their measures is 180 degrees.

### Similar Figures

Figures that have the same shape but not necessarily the same size.

### Tessellation

A repetitive pattern of polygons that fit together with no holes or gaps.

### Vertex

A common endpoint of the rays forming an angle.

### Complementary Angles

Two angles are this if the sum of their measure is 90 degrees.

### Line of Reflection

The line over which a figure is reflected.

### Parallelogram

A quadrilateral with opposite sides parallel and opposite sides congruent.

### Polygon

A simple closed figure in a plane formed by three or more line segments.

### Obtuse Angle

Any angle that measure greater than 90 degrees but less then 180 degrees.

### Transformation

A movement of a geometric figure.

### Congruent Angles

Angles that have the same measure.

### Acute Angle

An angle with a measure greater than zero and less than ninety degrees.

### Congruent Figures

Figures with equal corresponding sides of equal length and corresponding angles of equal measure.

### Line of Symmetry

A line that divides a figure into two halves that are reflections of each other.

### Line Symmetry

Figures that match exactly when folded in half.

### Reflection

When a figure if flipped over a line of symmetry.

### Rhombus

A parallelogram having four congruent sides.

### Straight Angle

An angle that measures exactly 180 degrees.

### Translation

When a geometric figure is slid horizontally or vertically, or both.

### Trapezoid

A quadrilateral with one pair of parallel sides.