math chapter 11 sections 1,2,3,4,5,6,7,8
congruent triangles
2 triangles are congruent if and only if all pairs of corresponding sides and angles are congruent
vertical angles
A pair of opposite congruent angles formed by intersecting lines
corresponding angles
Angles in the same place on different lines
alternate exterior angle
Angles outside a pair of 2 lines and on opposite sides of a transversal.
complentary angles
Angles that add up 2 90 degrees
adjacent angles
Angles that have a common side and a common vertex (corner point).
A=(pie)r^2
Area of a circle
A=bh
Area of a parallelogram
A=1/2h(b1+b2)
Area of a trapezoid
A=1/2bh
Area of a triangle
area
Length times Width
Transversal Line
Line that crosses two or more parallel lines.
P=2l+2w
Perimeter of a rectangle
P=a+b+c
Perimeter of a triangle
supplementary angles
Two angles whose sum is 180 degrees
pentagon
a five-sided polygon
quadralateral
a four-sided polygon
heptagon
a seven-sided polygon
hexogon
a six-sided polygon
decogon
a ten-sided polygon
Dodecagon
a twelve-sided polygon
octagon
an eight-sided polygon
nonagon
an nine-sided polygon
alternate interior angles
angles inside 2 lines and on opposite sides of a transversal
Base
bottom of a triangle
c=d times pie
circumference of circle
parallel lines
lines in the same plane that never intersect
corresponding parts
matching parts of congruent polygons
