Mathematics for Elementary Educators
III - D127 QUESTIONS AND
ANSWERS
Question : line
CORRECT ANSWER : A straight one-dimensional figure
that extends infinitely in both directions.
Question : perpendicular
CORRECT ANSWER : Describes lines intersecting each
other to form a 90 degree, or right, angle.
Question : circle
CORRECT ANSWER : The set of all points that are
equidistant from a point.
Question : radius
CORRECT ANSWER : The distance from the center of a
circle or sphere to any point on the outer edge.
Question : isosceles trapezoid
CORRECT ANSWER : Quadrilateral with one pair of
parallel opposite sides (the bases) and another pair of equal opposite sides.
Question : interior angle
CORRECT ANSWER : An angle inside a shape between
two joined sides.
Question : square
CORRECT ANSWER : A quadrilateral with four equal sides
and four 90° angles.
Question : regular polygon
CORRECT ANSWER : A polygon with equal sides and
equal angles.
Question : central angle
CORRECT ANSWER : Shape formed when 2 lines or rays
meet with vertex meets only the center point of the circle.
Question : hypotenuse
CORRECT ANSWER : The largest side of a right triangle,
opposite the right angle. Only right triangles have a hypotenuse.
Question : kite
CORRECT ANSWER : Quadrilateral with two sets of
adjacent equal sides and one set of equal opposite angles.
Question : reflex angle
CORRECT ANSWER : Angles greater than 180°.
Question : vertical line
CORRECT ANSWER : A line that runs up and down on the
coordinate plane, parallel to the y-axis. It has no run, or change in x-value.
Question : parallel
CORRECT ANSWER : Two lines, line segments, rays, or
planes that are the same distance from one another and never intersect.
Question : trapezoid
CORRECT ANSWER : Quadrilateral with one pair of
parallel opposite sides.
Question : bisect
CORRECT ANSWER : To divide into two equal parts.
Question : isosceles triangle
CORRECT ANSWER : A triangle with two equal sides and
two equal corresponding angles.
Question : angle
CORRECT ANSWER : The amount of rotation (often
measured in degrees) needed to make one line segment, ray, or line identical with another line segment, ray, or line.