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306090 right triangle

2 short leg= Hypot
s.r 3 short leg+ Long Leg 
454590 right triangle

l s.r 2= hypoteneuse

area of a square/rectangle

bxh=area

area of a parallelogram

bxh=area

area of a circle

A=pi r squared

circumference of a circle

2 pi r

perpendicular bisector

a segment,ray,line, or plane that is perpendicular to the segment at its midpoint

altitude of a triangle

an altitude of a triangle is a pependicular segment from a vertex to the line containing the side opposite the vertex

median of a triangle

a median of a triangle is a segment that joins a vertex of the triangle and the midpoint of the side opposite that vertex
