Unit One Vocabulary: Algebraic Skills & Equations

Pythagorean Theorem

A theorem used to find the side of a right triangle. a²+b²=c²

Hypotenuse

The longest side of a right triangle. (C)

Slope

A number that measures the steepness and direction of a line. y₂-y₁/x₂-x₁

x-intercept

The exact point on a graph that crosses or touches the horizontal axis.

y-intercept

The exact point on a graph where a line crosses the vertical axis.

Parallel

Straight lines on the same flat surface that never intersect or cross.

Perpendicular

Two straight lines that cross or meet each other at a 90 degree angle.

Intersecting

When two or more lines cross or meet to share a point.

Midpoint

The exact middle point on a line segment. M= (x₁+x₂/2 , y₁+y₂)

Perpendicular Bisector

A line that divides another line segment into two equal halves at a right angle. Flip and negate. Use point slope form y-y₁=m(x-x₁).

Directed Line Segment

A straight path that starts at one specific point and ends at another.