Chapter 10 Vocab Flashcards
Triangle formula
1/2bh
Square formula
s^2
Parallelogram formula
bh
Rectangle formula
bh
Rhombus formula
1/2d1d2
Kite formula
1/2d1d2
Trapezoid formula
1/2h(b1+b2)
Regular polygon
1/2Pa
Circle formula
πr^2
Area of a sector
n/360πr^2
Base of a parallelogram
can be any one of its sides
Altitude of a parallelogram
segment perpendicular to the line containing that base, drawn from the side opposite the base
Height of a parallelogram
the length of a altitude (perpendicular to the base) to the line containing that base
Height of a trapezoid
perpendicular distance between the bases
Radius of a regular polygon
distance from the center to a vertex
Apothem
perpendicular distance from the center to a side
Circle
the set of all points equidistant from a given point called the center
Diameter
segment that contains the center of a circle and has both endpoints on the circle
Radius
segment that has one endpoint at the center and the other on the circle
Congruent circles
have congruent radii
Central angle
an angle whose vertex is the center of the circle
Semi circle
half of a circle
Arc
part of a circle, measure in degrees
Minor arc
smaller then a semicircle
Major arc
larger then a semi circle
Adjacent arcs
arcs of the same circle that have exactly one point in common
Circumference
distance around the circle
Pi
the ratio of the circumference of a circle to its diameter
Concentric circles
coplanar circles that have the same center
Arc length
fraction of the circumference, length
Sector of a circle
region bounded by an arc of the circle and two radii to the arcs endpoint
Segment of a circle
part of a circle bounded by an arc and the segment joining its endpoints
Geometric Probability
points on a segment or in a region of a plane represent outcomes and the geometric probability of a event is a ratio that involves geometric measures such as length or area
Probability and Length
Point S is on segment AD is chosen at random. The probability that S is on segment BC (on AD) is the ratio of the length BC to the length of AD
Probability and area
Point S in region R is chosen at random. The probability that S is in region N (in R) is that ratio of the area of region N to the area of region R