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A parallelogram with 4 right angles
a parallelogram with four equal sides and equal opposite angles.
A triangle with no congruent sides
Triangle with 2 equal sides and 2 equal angles.
Triangle with a 90° angle
A trapezium is a four sided figure with no parallel
congruent segments converse
if the lenths of the two segments are equal then the two segments are congruent
if a point divides a segment into two congruent segments then the point is a midpoint
segment bisector converse
if a line (point segment or ray) intersects a segment at its midpoint then the line (point segment or ray) bisects the segment
congruent angles converse
if the measures of the two angles are equal then the two angles are congruent
angle bisector converse
if the ray divides an angle into two congruent angles then the ray bisects the angle
d/dx of sin(x)
d/dx of cos(x)
d/dx of tan(x)
d/dx of sec(x)
Derivative of cot(x)