# Geometry Online Credit Recovery

The Geometry Credit Recovery course combines mathematical reasoning and proof with an extension of students’ algebraic development in geometric contexts. The course focuses primarily on two-dimensional shapes in the Euclidean plane. Starting with segments and angles, students develop understanding of and work through problems and proofs involving congruence, similarity, parallel and perpendicular lines, quadrilaterals, and circles. Toward the end of the course, time is also spent extending the treatment of triangles into basic trigonometry concepts and providing students with a detailed taste of analytic geometry by developing and using the equation of a circle in the coordinate plane.

Semester 1

Unit 1: Basic Tools

Unit 2: Transformations

Unit 3: Reasoning and Proof

Unit 4: Vertical Angles and Corresponding Parts

Unit 5: Congruent Figures

Unit 6: Perimeter and Area

Unit 7: Equations of Parallel and Perpendicular Lines

Unit 8: Parallel Line and Triangle Properties

Unit 9: Triangle and Quadrilateral Properties

Unit 10: Similarity

Semester 2

Unit 1: Triangle Similarity

Unit 2: Theorems Involving Similarity

Unit 3: Circles and Composite Figures

Unit 4: Volume

Unit 5: Angles, Arcs, and Lines in a Circle

Unit 6: Arc Length, Sectors, and Inscribed Angles

Unit 7: Right Triangle Trigonometry

Unit 8: Conic Sections

Unit 9: Modeling with Geometry