Pre-Algebra: Chapter 11-1
The Language of Geometry
- A point: a specific location in space with no size or shape
- A line: A line is a collection of points that extends indefinitely in 2 directions
- A line segment: A line segment is part of a line containing 2 endpoints and all points between the endpoints
- A ray: A ray is a portion of a line that extends from 1 point indefinitely in ONE direction.
- An angle: When 2 rays have a common endpoint, they form an angle
- Vertex: the common endpoint is called the vertex
- Sides: The rays are called the sides of the angle
- Degree: Common unit of measure for angles is the degree
- Acute angles: have measures greater than 0° but less than 90°
- Right angles: have measures of 90°
- Obtuse angles: have measures greater than 90° but less than 180°
- Straight angles: have measure of 180°
- Parallel lines: lines that never intersect, the symbol is ||
- Perpendicular lines: lines that intersect to form a right angle, the symbol is ⊥
Here are some physical examples!
Algebra: Chapter 11-9
Equations with Radicals
Just like taking the square root of 2 sides of an equation, you can also SQUARE both sides of an equation. This is helpful when you have radicals (square roots), because the square of a square root is just the thing in the radical! Click here for more information and examples!