Vocab 1
A triangle that has at least two congruent sides.
Isosceles triangle
A conjecture that is proven
Theorem
In a right triangle, the side opposite the right angle
Hypotenuse
The sum of the lengths of a polygon's sides
Perimeter
In the equation below, what is the slope?
y = 7x + 2
7
How likely it is that an event will occur
Probability
Polygons that have corresponding sides and angles congruent
Congruent (polygons)
A quadrilateral with two pairs of parallel sides
Parallelogram
A slide that moves points the same distance and in the same direction
Translation
In the equation below, what is the y-intercept?
y = 3x - 1
-1
Two angles whose sum of their measures is 90 degrees
Complementary angles
Two angles whose sides form opposite rays
Vertical angles
A parallelogram with four congruent sides
Rhombus
A straight path that extends in two opposite directions without end and has no thickness
Line
In the equation below, what is the slope?
y = 4 - x
-1
The number of square units enclosed by a figure
Area
An angle whose measure is between 90 and 180
Obtuse angle
The ratio of the opposite side over the hypotenuse
Sine
When a scale factor is used to make a larger or smaller copy of a figure.
Dilation
If a line has a slope of 4 and a y-intercept at (0, 2), what is the slope-intercept equation of the line?
y = 4x + 2
A triangle whose sides are all congruent.
Equilateral triangle
A pair of adjacent angles whose noncommon sides are opposite rays
Linear pair
If a triangle is a right triangle, then the sum of the squares of the lengths of the legs is equal to the square of the length of the hypotenuse.
Pythagorean theorem
The point of concurrency of the angle bisectors of a triangle.
Incenter
If a line has a slope of -10 and a y-intercept at (0, -8), what is the slope-intercept equation of the line?
y = -10x - 8
OR
y = -10x + -8