Download 2016-2017 VOCABULARY 8 Angle and Triangle Relationships

VOCABULARY 8
ANGLE AND TRIANGLE RELATIONSHIPS USING REAL NUMBERS
Square-
Square Root-
Multiply a number by itself
a value that, when multiplied by itself,
gives the number
Radical Symbol
Examples:
4 2
6.25  2.5
13
13
Perfect Square
Right Triangle
A number made by squaring a whole
number
A triangle that has a right angle (90°)
Hypotenuse and Legs
Pythagorean Theorem
Hypotenuse: longest side; c
Legs;
a and b
𝑎2 + 𝑏 2 = 𝑐 2
Angle
Degree
The amount of turn between two
straight lines that have a common end
point (the vertex)
A measure for angles. There are 360
degrees in a full rotation.
Vertex
The symbol for degrees is °.
Adjacent Angles
A point where two or more straight
lines meet. A corner.
Two angles are Adjacent when they
have a common side and a common
vertex (corner point), and don't
overlap.
Complementary Angles
Supplementary Angles
Two Angles are Complementary when
they add up to 90 degrees
Two angles are Supplementary when
they add up to 180 degrees.
They do not have to be next to each
other to be complementary.
They do not have to be next to each
other to be supplementary.
Alternate Interior Angles
Alternate Exterior Angles
The pairs of angles on opposite sides of The pairs of angles on opposite sides of
the transversal but inside the two
the transversal but outside the two
lines.
lines.
Corresponding Angles
The angles in matching corners. The
angles create an X.
Congruent Angles
Vertical Angles
Vertical Angles are the angles opposite
each other when two lines cross. They
are always equal.
Angles are equal to each other.
Parallel Lines
Transversal
Two lines on a plane that never meet.
They are always the same distance
apart.
A line that crosses at least two other
lines.
Intersecting Lines
Where lines cross over (have some
common point).