#21 “Green” vs. “Yellow”Green Concepts will be on the test and will be part of your score!
Yellow Concepts will be on the test and will NOT BE PART OF YOUR SCORE!Do not let them bother you.They include the following:
Volume and surface areas of 3d figures (Cones, Spheres, Trapezoids, etc.)Compass and Straight Edge ConstructionsCircle Stuff - Circle Equations, Secants, Radii, Tangents, Chords.
#18 The 3 Triangle SegmentsMidsegment
Connects side bisectors, ½ opposite side
MedianConnects vertex and side bisector (broken into 1/3, 2/3 by centroid)
Altitude Connects vertex to opposite side at a right angle.
#15 Converse, Inverse, Contrapositive
Converse - Switch if and then
Inverse – Negate both
Contrapositive – Switch and negate both
#14 Triangle Inequalities
Compared to 2 sides, a 3rd Side must be: Less than the Sum Greater than the Difference
LSGD: The 3rd side is
“LessGood”
#13 Triangle Congruency ProofsLook for and Use: Shared Sides and Angles (Reflexive Property).Vertical Angles (Vertical Angles are
#11 Sides and Angles of Triangle
Biggest Angle opposite Biggest SideSmallest Angles opposite smallest side
#9 Coordinate Formulas
The average or halfway
points between the
values
Square root of the
Squares of the
differences
#8 SOH-CAH-TOA (Trig Functions)“Some Old Hag Cracked All Her Teeth On Apples”
#6 Coverting between Units
Linear (Like in lengths) Use ratio as isSquare (Like in area) Square ratio firstCubic (like in volume) Cube ratio first
Example3 feet = 1 yard9 feet = 1 square yard27 feet = 1 cubic yard
#5 Significant DigitsZeros only count if they are between non zeros.Leading or Trailing Zeros don’t count.
.00003 Degree of Precision = 11.0003 Degree of Precision = 51.2334 Degree of Precision = 53 x Degree of Precision = 1 (the
#4 Minimum/MaximumsBecause of rounding the degree of accuracy is half a unit each side of the unit of measure.
Example: Paul measured his bedroom as 10 feet long and 12 feet wide.
What is the minimum and maximum area of his bedroom?
Use 9.5 x 11.5 to get the minimum of 109.25 sq. ft.Use 10.5x 12.5 to get the maximum of 131.25 sq ft.
#3 Use -1 to Find AnglesIf you know the trig ratio but not the angle, Use the
corresponding -1 button to find the angle measure.
(Push 2nd button 1st)