Rays, Lines & Points
looking at the diagram for questions 13-15 on page 376, list 2 collinear points
B, D or A, B, C or D, E
looking at the diagram for questions 20-24 on page 382, Name an obtuse angle
AGE, BGE, CGF... (use angle symbol before 3 letters (ray, vertex, ray)
obtuse angle is greater than 90, less than 180
classify a triangle by its angles: 32, 58, 90
right triangle: right triangles have 1 90-degree angle.
what do you call a 6 sided polygon?
hexagon
look at pictures for Question #16 on page 413, how many lines of symmetry does this starfish have?
5
Looking at the diagram for #13-15 on page 376, identify 2 parallel lines
AC & DE, each with a line with arrows on either end of it above the letters
looking at the diagram for questions 20-24 on page 382, name an acute angle
AGB, BGD,... (use the angle symbol before the letters and write them in order: ray, vertex, ray)
an acute angle is less than 90
classify this triangle by its angles: 135, 23, 22
obtuse triangle: obtuse triangles have 1 obtuse angle.
what do you call a quadrilateral with exactly 1 pair of parallel lines?
trapezoid
Answer Question #2 on page 407
no, it is not congruent or similar
looking at the diagram for questions 13-15 on page 376, name a line segment that intersects line BD (line symbol above: line w/ double arrow heads)
AC (with line segment symbol above, no arrows)
Find a complement and supplement to a 46 degree angle.
complement: 90 - 46 =44
supplement: 180- 46 =134
Draw an obtuse scalene triangle
obtuse triangles have 1 obtuse angle & scalene triangles have all 3 sides of different lengths
list the characteristics that define a rhombus
2 pairs of parallel sides, has 4 congruent sides
on page 417, answer question 1
no, this is a rotation, not a translation
On page 381, measure angle to question #4
160
Tell whether the angles are complementary, supplementary, or neither: 115 & 65
supplementary: 180-65 = 115 (supplementary angles add up to 180 degrees)
draw an acute equilateral triangle
an acute triangle has all acute angles, an equilateral triangle had all sides of equal lengths
explain this statement: a square can be called a rhombus but a rhombus cannot be called a square
a square has the characteristics of a rhombus (2 sets of parallel lines, 4 congruent sides) but a rhombus lacks the characteristics that define a square (4 right angles, in addition to the characteristics listed for the rhombus)
on page 402, solve 4x4 word square #2
a: gram
b: rare
c: area
d: mean
look at the diagram for question 20-24 on page 382, measure angle ABC
50 degrees
tell whether the angles are complementary, supplementary, or neither: 73 & 27
neither: 73 + 27 =100, complementary angles add up to 90 and supplementary angles add up to 180
what is the sum of all the angles in a triangle?
180
Look at Check Understanding Question #2 on page 398, answer question a & b
a.) parallelogram, rectangle, quadrilateral
b.)Rectangle is the best: it is the most descriptive/ specific. There are right angles and 2 pairs of congruent sides
on page 417, answer check understanding question 3
a. no (it is a reflection), b. yes (180 degree rotation), c.no (reflection)