# geometry terms

## 20 terms

### chord

a line segment joining two points on a curve

any line segment connected from the center of a circle to the edge of the circle

### diameter

any straight line segment that passes through the center of a circle and whose endpoints are on the circle

### circumference

the distance around a closed curve like a circle

### similar

two geometrical objects are called similar if they both have the same shape

### perimeter

the path that surrounds a shape

### arc

a segment of the circumference of a circle

### sector

a section of a circle with a radius for each side and the included arc of a circle

### vertex

a corner or a point where lines meet or the top or high point of something

### central angle

an angle whose vertex is the center of a circle, and whose sides pass through a pair of points on the circle

### pentagon

a polygon with 5 sides

### parallelogram

a quadrilateral with 2 pairs of parallel sides

### trapezoid

a quadrilateral with 1 set of parallel sides

### rhombus

a quadrilateral with 4 equal sides (a square is a rhombus with 4 equal sides)

a 4-sided polygon

### congruent

the same size and shape

### parallel

parallel lines are two lines in the same plane that never intersect

### perpendicular

2 lines that meet at a right angle