Define & Conquer

Define & Conquer is a multiplayer math review game for Geometry. Claim squares by naming undefined terms, choosing precise definitions, fixing flawed definitions with counterexamples, and finding triangle areas with ½ab sin C. Get 4 in a row to win.

Skills: Point, line and plane as undefined terms, segment, ray and line notation, collinear and coplanar, precise definitions of angle, circle, radius, perpendicular and parallel lines, segment, midpoint, angle bisector and perpendicular bisector, counterexamples to flawed definitions, biconditional definitions, height h = b sin C, deriving Area = ½ab sin C, computing areas with exact and calculator values, solving for a missing side or included angle from the area, why sin 30° = sin 150° gives equal areas.

New problems every game, with Easy, Medium and Hard levels. Every miss shows a short explanation.

Standards (Oklahoma OAS first, then national):

OAS G.RL.1.1, 3 · G.2D.1.7 · PC.T.2.3

Common Core: HSG-CO.A.1 · HSG-SRT.D.9

What you get: one HTML game file that runs in any browser (Chromebooks, laptops, iPads, smartboards) plus a one-page Quick Start PDF. 1–6 players or teams, no logins, no installs.

Single-teacher license. Included in the Fletcher Math All-Access bundle.