MATH 2 MIDTERM VOCAB EXPECTED QUESTIONS
WITH VERIFIED ANSWERS
Question 1.
line of symmetry
ANSWER
a line that a figure in the plane has if the figure can be mapped onto itself by a reflection in
the line
Question 2.
point symmetry
ANSWER
the point of rotation within a figure often found where the lines of symmetry intersect; also
known as rotational symmetry
Question 3.
reflection
ANSWER
a type of transformation that uses a line that acts as a mirror with an image reflected in the
line
,Question 4.
rotation
ANSWER
a type of transformation in which a figure is turned about a fixed point
Question 5.
rotation symmetry
ANSWER
a figure in the plane has this if the figure can be mapped onto itself by a rotation of 180
degrees or less
,Question 6.
symmetry
ANSWER
a figure has this if there is an isometry that maps the figure onto itself; an exact
correspondence or position or form about a given point, line, or plane
Question 7.
transformation
ANSWER
the operation that maps, or moves, a pre-image onto an image.
Question 8.
translation
ANSWER
, Used in geometry to describe moving an object a certain distance. The object is not altered in
any other way than up, down, left or right. Every point of the object must be moved in the
same direction and for the same distance.
Question 9.
Isometry
ANSWER
A transformation that preserves lengths (translation, rotation, reflection); aka rigid
transformation.
Question 10.
dilation
ANSWER
A transformation that produces an image that is the same shape as the pre-image, but is a
different size, thus creating non-congruent figures. It either stretches or shrinks the original
figure.
Question 11.
pre-image
WITH VERIFIED ANSWERS
Question 1.
line of symmetry
ANSWER
a line that a figure in the plane has if the figure can be mapped onto itself by a reflection in
the line
Question 2.
point symmetry
ANSWER
the point of rotation within a figure often found where the lines of symmetry intersect; also
known as rotational symmetry
Question 3.
reflection
ANSWER
a type of transformation that uses a line that acts as a mirror with an image reflected in the
line
,Question 4.
rotation
ANSWER
a type of transformation in which a figure is turned about a fixed point
Question 5.
rotation symmetry
ANSWER
a figure in the plane has this if the figure can be mapped onto itself by a rotation of 180
degrees or less
,Question 6.
symmetry
ANSWER
a figure has this if there is an isometry that maps the figure onto itself; an exact
correspondence or position or form about a given point, line, or plane
Question 7.
transformation
ANSWER
the operation that maps, or moves, a pre-image onto an image.
Question 8.
translation
ANSWER
, Used in geometry to describe moving an object a certain distance. The object is not altered in
any other way than up, down, left or right. Every point of the object must be moved in the
same direction and for the same distance.
Question 9.
Isometry
ANSWER
A transformation that preserves lengths (translation, rotation, reflection); aka rigid
transformation.
Question 10.
dilation
ANSWER
A transformation that produces an image that is the same shape as the pre-image, but is a
different size, thus creating non-congruent figures. It either stretches or shrinks the original
figure.
Question 11.
pre-image
