Midterm Rev Flashcards
Parallelogram properties
•opp sides parallel
•opp sides congruent
•opp angles congruent
•consecutive angles are supplementary
•Diagonals bisect each other
Rhombus
•properties of parallelogram
•Diagonals are perpendicular to
•4 congruent sides
•Diagonals bisect opp angles
Rectangle
•properties of parallelogram
•4 right angles
•Diagonals are congruent
Properties of square
•properties of parallelogram, rhombus, and rectangle (properties of everything else)
Trapezoid properties
•only one pair of parallel sides(bases)
•consecutive angles are supplementary
•MID-SEGMENT OF A TRAP: connects the midpoints of the legs. Is equal to the average of the two bases
Isosceles trap
•non parallel sides are congruent
•Diagonals are congruent
•Base angles are congruent
•opp angles are supplementary
Sum of int angle meaure
180(n-2)
Each int angle measure
180(n-2)/n
Sum of ext angle measures
360
Ine ext angle measure
360/n
Altitude(cord geometry)
- Find the slope of AC
2.find the opposite reciprocal
3.use the coordinates of point b and slope to write a point slope equation
Median(cord geometry)
1.find midpoint
2.find the slope of the midpoint to the vertex
3.put the equation in point slope form with the things you solved for
What is the justification for angle 2 equal to angle 3
Supplements of congruent angles are congruent
What is the steps to say two segments are equal. (The given says there is a perp bisector)
1.B is the mid of AC (def segment bisector)
2.AB congruent to CB (Def midpoint)
4 congruence correspondence
AAS
SAS
SSS
ASA
