Geometry Semester 2 Final Exam Answer Key

Students identify triangle classifications (acute, obtuse, scalene, equilateral) from given angle or side measures.

Students calculate slope, midpoint, and distance between coordinate points.

Students apply polygon interior- and exterior-angle-sum formulas to find angle measures of regular polygons.

Students identify the correct triangle-congruence postulate (SSS, SAS, ASA, AAS, or HL) and complete a two-column proof with a missing reason.

Students apply properties of parallelograms, kites, rhombi, and trapezoids to solve for unknown angles and side lengths.

Assign Form A and Form B to alternating seats or as two separate testing sessions, since both forms cover the identical 61-question bank in a different order (pages 1-8 vs. 9-16).

The exam spans a broad range of topics — coordinate geometry, polygon angles, triangle congruence, and quadrilateral properties — so consider using it as a comprehensive semester review rather than a single-topic quiz.

Review the missing-reason proof item (Q49 on Form A, Q58 on Form B) with students beforehand, since it requires filling in a two-column proof step rather than selecting from four choices.

Coordinate geometry — students calculate slope, midpoint, and distance between given points (e.g., Q37, Q39, Q51 on Form A).

Polygon angle relationships — students apply interior/exterior angle-sum formulas to regular polygons such as octagons, pentagons, and nonagons.

Triangle congruence and proof — students select the correct postulate (SSS, SAS, ASA, AAS, HL) and complete a two-column proof with a missing reason.

Quadrilateral properties — students use properties of parallelograms, kites, rhombi, and trapezoids to solve for unknown angles and side lengths.