Question | Answer |
Reflect across x-axis
(rule) | (x,-y) |
Reflect across y-axis
(rule) | (-x,y) |
Reflect across y=x
(rule) | (y,x) |
Rotate 90 degrees
(rule) | (-y,x) |
Rotate 180 degrees
(rule) | (-x,-y) |
What is a translation?
(definition) | A transformation that shifts or slides every point of a figure in the same distance and direction. |
What is plane symmetry?
(definition) | A three dimentional figure that can be divided into two conguent reflected halves by a plane. |
What is a vector?
(definition) | A quantity that has both magnitude and direction. |
What is the Line of Symmetry?
(definition) | A line that divides a plane figure into two congruent reflected halves. |
What does it mean when two or more points are "coplanar"? | The points lie on the same plane. |
What does it mean when two or more points are "collinear"? | The points lie on the same line. |
What is an undefined term?
(definition) | Cannot be defined using other figures. |
What is a point?
(definition) | An undefined term in Geometry; it has a location and has no size. |
What is a line?
(definition) | An undefined term in Geometry; a line is a straight path that has no thickness and continues to an infinitive. |
What is a vertex?
(definition) | The intersectionof two or more lines, segments, rays, or planes. |
What is a Segment?
(definition) | A part of a line consisting of two endpoints and all points between them. |
What is a plane?
(definition) | An undefined term in Geometry; a flat surface, no thickness, never-endng. |
What does it mean when you have "opposite rays"?
(definition) | Two rays that have the same endpoint an form a line in opposite diections. |
How do you label a point? | Using Capital Letters. |
How do you label a line? | Using a lowercase cursive letter or two points. |
How do you label a vertex? | Using capital letters. |
How do you label a plane? | Using 3 points on the plane. |
How do you label a line segment? | Write the two endpoints with a bar above them. |
How do you label an endpoint? | Using capital letters. |
How do you label a ray? | Writing the endpoint and the other point on the ray. |
How do you label opposite rays? | Write the common endpoint, then the other point on the rays. |