CCSS.MATH.CONTENT.HSG.CO.C.9Prove theorems about lines and angles.
Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints.
LTI launch URL
(help)
https://schoolyourself.org/page/lti/sy/geometry/alternate-exterior-angles
