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Chapter 7 Math Terms
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Gravity
Terms in this set (46)
point
a location, has no size, name a point by using a capital letter
line
a series of points that extend in opposite directions without end. you name a line by any 2 points on the line or a lowercase letter
ray
part of a line with one endpoint and all the points of the line on one side of the endpoint. you name a ray by using 2 points, starting with the endpoint
segment
part of a line with 2 endpoints and all points in between. you name a segment by its endpoints
plane
a flat surface that extends indefinitely in all directions and has no thickness
intersecting lines
have exactly one point in common
parallel lines
lines in the same place that never intersect
skew lines
lie in different planes, not parallel nor intersecting
angle
Formed by 2 rays with a common endpoint
vertex
point of intersection of 2 sides of an angle
Acute angle
Angle less than 90 degrees
Right angle
Angle that is exactly 90 degrees
Obtuse angle
Angle more than 90 degrees
Straight angle
Measures at 180 degrees
Complementary angles
Angle whose sum is 90 degrees
Supplementary angles
Angle whose sum is 180 degrees
Adjacent angles
Share a vertex and a side, next to each other
Vertical angles
Formed by 2 intersecting lines, opposite of each other
Congruent angles
Angles with equal measure
Congruent sides
Sides that are equal in measure
Scalene triangle
Triangle with no sides congruent
Isosceles triangle
A triangle with at least 2 sides being congruent. If 2 sides are congruent, then 2 angles are congruent
equilateral triangle
All sides of a triangle are congruent
Right triangle
1 angle in the triangle measuring 90 degrees
Acute triangle
All angles in the triangle are acute
Obtuse triangle
1 angle in the triangle that is greater than 90 degrees
quadrilateral
Polygon with 4 sides
polygon
Shape with sides that is a closed shape
pentagon
Polygon with 5 sides
hexagon
Polygon with 6 sides
octagon
Polygon with 8 sides
decagon
Polygon with 10 sides
Regular polygon
Polygon where all sides and angles are congruent
Irregular polygon
Polygon where all sides and angles are not congruent
trapezoid
Quadrilateral with exactly 1 pair of parallel sides
parallelogram
Quadrilateral with 2 pairs of parallel sides
rectangle
Parallelogram with ALL angles congruent
rhombus
Parallelogram with ALL sides congruent
square
Parallelogram with ALL SIDES AND ANGLES congruent
circle
The set of points in a plane that are all the same distance from one given point
radius
Segment from the center of the circle to the end of the circle
diameter
Segment that passes through the center of a circle and has both endpoints of the circle
Central angle
Angle with the vertex at the center of the circle
chord
Segment whose endpoints are on the circle
arc
Part of a circle
semicircle
Half of a circle
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