Theorem
Postulate
Theorem
Postulate
Theorem
100
If two ll planes are cut by a third plane, then the lines of intersection are ll.
What is Theorem 3-1
100
If two ll lines are cut by a transversal, then corresponding < are congruent.
What is Postulate 10
100
If two lines are cut by a transversal and s.s in. < are supp., then the lines are ll
What is Theorem 3-8
100
Two lines ll to a third line is ll to each other
What is Theorem 3-10
200
If two ll line are cut by a transversal, then alt. in. < are congruent.
What is Theorem 3-2
200
If two lines are cut by a transversal and corresponding <'s are congruent, then the lines are ll.
What is Postulate 11
200
In a plane two lines are perpendicular to the same line are ll.
What is Theorem 3-7
200
The sum of the measures of the <'s of a triangle is 180.
What is 3-11
300
If two ll lines are cut by a transversal, then the s.s in.< are supp.
What is Theorem 3-3
300
Through a point outside a line, there is exactly one line ll to given line.
What is Theorem 3-8
300
The measure of an exterior of < of triangle = the sum of the measures of the two remote in. <.
What is Theorem 3-12
400
If a transversal is perpendicular to one of two ll lines, then it is perpendicular to the other one also.
What is Theorem 3-4
400
The sum of the measures of the <'s of a convex polygon with n sides is (n - 2)180.
What is Theorem 3-13
500
If two lines are cut by a transversal and alt. in. < are congruent, then the lines are ll.
What is Theorem 3-6
500
Through a point outside a line, there is exactly one line perpendicular to the given line.
What is Theorem 3-9
500
The sum of the measures of the in. < of any convex polygon, one < at each vertex is 360.
What is Theorem 3-14
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