vocabulary
A linear pair is _________ and __________.
supplementary, adjacent
The contrapositive of a statement is __________.
In the conserve, both p and q are negated.
x – 20 = 4 – 3x
x = 6
What does this mean when comparing shapes?
~
similar
r = 8, find circumference
16π
The sum of a polygon's ___________ ais 360 degrees.
exterior angles
Perpendicular lines have slopes that are _________.
negative reciprocals
–4(–3x – 8) = 10x+20
x = -6
What does this mean?
//
parallel
r = 20, find circumference
40π
Vertical angles are formed by 2 ___________.
Intersecting lines
equal to itself
2 (4–x)–3(x+3)=–11
x = 2
What does this mean?
^
and
d = 13, find area
42.25π
Similar triangles have __________ and __________.
congruent angles, proportional sides
How is an altitude formed?
from vertex and is perpendicular to the side opposite
–(–8–3x)=–2(1–x)+6x
x = 2
What does this mean in deductive reasoning?
~
not or negate
Diameter is _______ the radius
2x
The converse of a statement is __________.
When the hypothesis and conclusion switch.
SAS means _________
Triangle congruence...
Side-Angle-Side
3(3x–8)–5(3x–8)=4(x–2)–6(x–2)
x = 3
What does this mean?
V
or
Diameter is a ___________ that goes through the _______.
chord, center