what are the next four terms in the sequence 1/1, 1/4, 1/9, 1/16

1/25, 1/36, 1/49, 1/64

you square the digits in consecutive form of the denominator.

if you know all angles are 90 degrees what property would you use to proove this

is this for a triangle or for a quadrilateral? Because a triangle can not have all 3 90 degrees

yes a quadrilateral

when the lengths of opposite sides are parallel, and they form perpendicular.

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