Types of Angles
The amount of rotation between two lines that meet at a point.
What is an angle?
A four-sided shape where each angle is a right angle.
What is a rectangle?
A grid formed by two intersecting number lines, one horizontal and the other vertical.
What is a coordinate grid?
A transformation in which a shape slides to a new position without changing size, shape, or orientation.
What is a translation?
A transformation in which a shape is flipped across a line to form a mirror image.
What is a reflection?
The lines that meet to form an angle are called this.
What are arms?
Lines that are always the exact same distance apart.
What are parallel lines?
The horizontal number line on a coordinate grid is called this.
What is the x-axis (or horizontal axis)?
This is another term used to describe a translation.
What is a slide?
This is another term used to describe a reflection.
What is a flip?
The point where the two arms of an angle meet.
What is a vertex?
Every rectangle has this many pairs of parallel sides.
What is two?
The point on a coordinate grid where the axes intersect.
What is the origin?
The shape that is the result of a translation.
What is an image?
The line that a shape is reflected across.
What is the line of reflection?
An angle that looks exactly like a square corner.
What is a right angle?
A line that divides a 2-D shape in half so that if you fold along the line, the halves match.
What is a line of symmetry?
The vertical number line on a coordinate grid is called this.
What is the y-axis (or vertical axis)?
A translation involves moving right or left, as well as in these directions.
What are up or down?
True or False: During a reflection, different points on the original shape move different amounts.
What is True?
An angle that is greater than a right angle but less than a straight angle.
What is an obtuse angle?
A special rectangle with four right angles and four equal sides.
What is a square?
When plotting points on a grid, you must move along this axis before moving up.
What is the horizontal axis?
If a triangle moves 3 spaces to the right and 1 space down, every point on the shape has moved this amount.
What is the same amount?
When a line of reflection is located on one side of the shape, it acts exactly like this line.
What is a line of symmetry?