Geometry quadrilateral criteria
Area for rhombus and kite
A=1/2(d1•d2)
Area for trapezoid
A=1/2h(b1+b2)
area for parallelogram
A=B•H
Rectangle
-4 right angles -diagonals are congruent -all prop of a parallelogram
Trapezoid
-A quadrilateral with exactly one pair of parallel sides -the parallel sides are bases and the other are legs
Kite
-a quadrilateral with exactly 2 distinct pairs of adjacent congruent sides
isosceles trapezoid
-a trapezoid with congruent legs -base angles are congruent (bottom 2 r the same and top 2 are the same)
Rhombus
-has 4 congruent sides -has perpendicular diagonals -diganols bisect opp angles (they r same) -all prop of a parallelogram
Square
-has all properties of a rectangle and rhombus
Parallelogram
-opp sides are parallel -opp sides are congruent - consecutive (side) angles are supp -diagonals bisect each other
Same slope
Parallel
reciprocal slope
Perpendicular
Distance
Side lengths |— (x2-x1)2+(y2-y1)2
Slope
To find if parallel=rectangle or square Y2-Y1/x2-x1
Midpoint
x1+x2/2, y1+y2/2