QUESTIONS WITH ANSWERS GRADED A+
◉ geoboards. Answer: provide tactile experience of creating right
triangles. (a block of wood with rectangular array of pins. Pins are used
to hold rubber bands or geobands in place. They are used to form
triangles or other polygons.) (useful for demonsrating congurence and
similarity
◉ visual discrimination. Answer: ability to compare and contrast
objects
◉ 5 stages of learning geometry. Answer: visualization-recognize and
name figures; analysis- describe figures and objects; informal deduction-
classification of figures and objects. (These are noticeable during
elementary school.); deduction- involves writing proofs from
definitions; rigor- work in several geometrical systems
◉ translation. Answer: sliding movement
A figure can be moved left, right, up, down, or diagonally
,◉ rotations. Answer: is a turning movement around a point
◉ reflections. Answer: is a mirror image across a line
◉ dilations. Answer: expansions
◉ contractions. Answer: reductions
◉ similar figures. Answer: have same shape
◉ congruent figures. Answer: have exactly the same size
◉ symmetry. Answer: occurs when perfect matching occurs
◉ attribute blocks. Answer: ideal for working on congruence and
similarity.
◉ counting bars. Answer: illustrats congruence and similarity
◉ tessellations. Answer: tiling patterns, are repeating a shape in a
systematic pattern in order to completely fill a space.
,◉ circle graphs, or pie charts. Answer: represent the relationship that
each part has to be whole.
◉ mathematical probability. Answer: based upon chance: the likelihood
of an event occurring
◉ historical probability. Answer: based upon data accumulation over
time
◉ A fractions is used to represent probability:. Answer: # of times the
successful event occures/ # of attempts that were made
◉ mean. Answer: average of the values
◉ median. Answer: middle value in the set
◉ mode. Answer: value that occurs most frequently
◉ outlier. Answer: data value that is far from the other values in that
particular set
◉ history. Answer: study of the material record of the past
, ◉ If you're calculating the sum of two negative integers, it looks like
this:. Answer: (-7) + (-2) = -9
◉ ADDING ( +/-)
To get the sum of a negative and a positive number, use the sign of the
larger number and subtract. For example:
The sign will be that of the larger number. Remember that adding a
negative number is the same as subtracting a positive one.. Answer: (-7)
+ 4 = -3
6 + (-9) = -3
(-3) + 7 = 4
5 + (-3) = 2
The sign will be that of the larger number. Remember that adding a
negative number is the same as subtracting a positive one.
◉ SUBTRACTING (+/-)