Vocabulary
Two figures are this if one is an enlargement of the other.
What is similar?
If an object or image is enlarged by a scale factor of k, then the area of the image =
1) K2 ➕ the area of the object 2) K2 ➖ the area of the object 3) K2 ✖️ the area of the object 4) K2 ➗ the area of the object
What is 3) K2 ✖️ the area of the object?
Will has a purple triangular wizard hat. How many lines of symmetry does his hat have?
Will’s hat has 3 lines of symmetry.
This is the number of times a shape maps onto itself in a complete 360degree turn.
What is the Order of Rotational Symmetry?
Two triangles are this if they are identical in every respect apart from position.
What is congruent?
If a scale factor is >1, an enlargement occurs. If a scale factor is <1, this occurs.
What is a reduction?
This turns a shape or a figure about a point and through a given angle.
What is a rotation?
Lucas gets a new slingshot with a scale factor k = 3/2. Comparing to the old one, is his new slingshot smaller (reduced) or bigger (enlarged)?
Lucas’ new slingshot is bigger (enlarged).
If triangle ABC is translated to a new position by sliding every point of ABC the same distance in the same direction, we call it this.
What is triangle A’B’C’?
A shape has this if it can be folded on a line so that one half of the figure matches the other half exactly.
What is line symmetry?
If two triangles are equiangular, then they are similar and their corresponding sides are in the same proportion or this.
What is the same ratio?
This occurs to a figure when every point on that figure is moved the same distance in the same direction.
What is a transition?
The point about which a figure rotates is called the Center Of Rotation, often labeled as this.
What is Point O?