AlternateInteriorAnglesSkewLinesLineParallelLinesBisectCoplanarSegmentSupplementaryAnglesAdjacentAngleAcuteTriangleObtuseTriangleAlternateExteriorAnglesPlaneStraightAngleIsoscelesTrianglePerpendicularLinesScaleneTriangleRightAngleCongruentAcuteAngleRayCorrespondingAnglesPointLinearPairEquillateralTriangleCollinearComplementaryAnglesMidpointParallelPlanesEndpointAngleObtuseAngleOppositeRaysEquiangularTriangleSame-sideInteriorAnglesIntersectVerticalanglesTransversalRightTriangleAlternateInteriorAnglesSkewLinesLineParallelLinesBisectCoplanarSegmentSupplementaryAnglesAdjacentAngleAcuteTriangleObtuseTriangleAlternateExteriorAnglesPlaneStraightAngleIsoscelesTrianglePerpendicularLinesScaleneTriangleRightAngleCongruentAcuteAngleRayCorrespondingAnglesPointLinearPairEquillateralTriangleCollinearComplementaryAnglesMidpointParallelPlanesEndpointAngleObtuseAngleOppositeRaysEquiangularTriangleSame-sideInteriorAnglesIntersectVerticalanglesTransversalRightTriangle