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Geometry - Coggle Diagram
Geometry
shapes
3d
2d
quadrilaterals
four sides
four angles
int. angles sum = 360
parallelograms
area = base*height
opposite angles are congruent
two pairs of congruent sides
two pairs of parallel sides
rectangles
four right angles
parallelogram
area = width*length
rhombuses
four congruent sides
parallelogram
area = (diagonal*diagonal)/2
squares
rhombus and a rectangle combined
four equal sides
area = side^2
perimeter = 4sides
kite
adjacent sides congruent
pair of opposite angles are congruent
area = (diagonal*diagonal)/2
triangles
pentagon
five sides
five angles
int. angle sum = 540
interior angle = 108
pentagram
(5/4)(s^2)tan(3pi/10)
hexagon
septagon
seven sides
seven angles
interior angle = 128.571
int. angles sum = 900
central angle = 51.43 about
area = (7/4)a^2cot(180/7)
octagon
circle
area = pi*r^2
circumference = 2pi*r
everything is the same distance from center; radius
diameter = 2r