Unit 1, Lesson 20
Transformations, Transversals, and Proof
Geometry
20.1
Warm-up
Angle Relationships
Lines
Figure A
Figure B
Figure C
Figure D
Student Lesson Summary
There are often several different ways to explain why statements are true. Comparing the different ways can lead to new insights or more flexible understanding. Consider the angles formed when 2 parallel lines
Suppose we want to explain why angle
A different explanation can prove the same fact using a translation and the idea that vertical angles are congruent. Try thinking of that explanation yourself.
None
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