Geometry Regents Review
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What is the sum of interior angles in a polygon?
180(n2)

How do you find each interior angle of a regular polygon?
(180(n2))/2

What is the sum of exterior angles in a polygon?
360 degrees

How do you find each exterior angle of a regular polygon?
360/n

What is the rule for finding the converse?
Switch the positions of the conditions

What is the rule for finding the inverse?
Negate the conditions

What is the rule for finding the contrapositive?
Negate and switch the positions of the conditions

What conditional rule has the same truth value as the original statement?
Contrapositive

How many congruent sides do each of the following triangles have?
Scalene
Isosceles
Equilateral
 Scalene  none
 Isosceles  2
 Equilateral  3

Which methods can be used to prove triangles congruent?
 SSS
 SAS
 ASA
 AAS
 HL (for right triangles)

What is the locus of a fixed distance from a point?
A circle whose center is ____ and whose radius is ____

What is the locus of a fixed distance from a line?
Two parallel lines on opposite sides each a given distance away

What is the locus of two parallel lines?
A third parallel line midway between them

What is the locus of two intersecting lines?
The angle bisectors of the angle formed by the intersecting lines

What is the locus of two points?
The perpendicular bisector of the segment joining the two points

What angle is the longest side of a triangle opposite of?
The largest angle

What method can prove triangles similar?
AA

The midsegment of a triangle that is parallel to the third side is how much of that length?
Half

What is the formula for midpoints?
M = (avg x, avg y)

What is the formula for distance?

What is the formula for slope?

What does an isometry do in a transformation?
Preserves length

What does orientation mean in a transformation?
Label order