geometry terms 2 Flashcards
(26 cards)
What is a point in geometry?
A tiny dot that shows a place
What is a line
a straight path that goes forever in both directions
What is a line segment
A part of a line with two ends
What is a ray
A part of a line with one end that goes forever in one direction
what is a plane
a flat surface that goes forever in all directions
what is a angle
a shape made by 2 rays that share a point
what is a acute angle
angle smaller than 90 degrees
what is a right angle
90 degree angle
what is an obtuse angle
angle bigger than 90 degrees but not larger than 180 degree
what is a straight angle
180 degree angle
what are parallel lines
lines that never cross
what are intersecting lines
lines that cross at one point
what is a triangle
shape with 3 sides and 3 angles
what is a quadrilateral
shape with 4 sides
what is a polygon
closed shape made with straight lines
what is a circle
round shape where all point are the same distance from the center
what is a radius
line from the center of a circle to an edge
what is a diameter
line going all the way across through the center of the circle
what is a chord
line connecting 2 points on a circle
what is a arc
part of a circles edge
what is circumference
distance around a circle
what is area
space inside a shape
what is perimeter
distance around a shape
what is volume
space inside a 3d shape
