Angles and Angle Relationships
Polygons
Similatiry
Symmetry
Transformations
100
Every triangle has at least one of these angles.
What are acute angles?
100
The measure of an angle in this regular polygon is 120°.
What is a hexagon?
100
The corresponding sides of two similar figures always have this relationship.
What is proportional?
100
Reflected shapes keep their appearance if they have this kind of symmetry.
What is line or bilateral symmetry?
100
This transformation can be described by (x, y) > (-x, y).
What is a reflection in the y-axis?
200
They share a vertex and a side and are usually supplementary.
What are adjacent angles?
200
This term, usually used for triangles, can also refer to a trapezoid with two pairs of congruent angles.
What is Isoscoles
200
This is the height of a tree if its shadow is 18 feet when a 6-foot man’s shadow is 9 feet.
What is What is 12 feet?
200
These are the only ones of their kind with any rotational symmetry.
What are equilateral triangles?
200
A reflection in the x-axis will produce this transformation in coordinate notation.
What is (x, y) > (x, -y)?
300
A right triangle always has a pair of angles relating this way.
What is complementary?
300
This always has two pairs of supplementary angles.
What is a trapezoid?
300
These polygons are always similar, no matter how big or small.
What are regular polygons?
300
These four capital letters are the only ones with both horizontal and vertical line symmetry.
What are H, I, O, and X.
300
Reflecting an object in the x-axis and then in the y-axis will have the same end result as this transformation.
What is 180° rotation around the origin
400
These congruent angles are found on opposite sides of the transversal and outside of the parallel lines
What are alternate exterior angles?
400
A triangle can’t have one, but any other non-regular polygon can.
What is a reflex angle?
400
This is the ratio of the areas of two similar polygons if the ratio of their perimeters is 1 to 3.
What is What is 1 to 9?
400
These three capital letters have no line symmetry, yet have 180° rotational symmetry.
What are N, S, and Z?
400
If a translation of an object can produce the same image as a reflection of the object, the object must have this.
What is line symmetry
500
Most regular polygons have only this type of angle.
What are obtuse angles?
500
For a triangle, these always add to 360°
What are exterior angles?
500
Similar but not congruent figures result from this kind of transformation.
What is What is a dilation (or reduction or enlargement)?
500
For a regular polygon, you can find the number of degrees of rotation that gives the same orientation by dividing this value by the number of sides.
What is 360°?
500
Reflection in the y = x line will result in this transformation in coordinate notation.
What is What is (x, y) > (y, x)?
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