arcdegree, degree, grad, grade, oxtant

rectangle, axis, ellipse, centroid, equilateral triangle, crosshairs, quartile, locus, alignment, matrix, pushpin, connector, lobe, hyades, prograde, syncline, fovea, nebulosity, bell curve, triangle, galactic equator, ecliptic, spots, premolar, arrow, configuration, celestial pole, celestial sphere, mihrab, dextral, isosceles triangle, synclinal, lateral epicondyle, node, intercostal, cross hairs, dorsum, tiers, mercator projection, overlay, datum, pane, corner, capricornus, diagram, oculus, protrusion, parameter, area, mediastinum, lunate, rectus, pentagram, zodiacal light, constellation, angulation, pod, concavity, quintile, extremity, lumbar vertebra, echelon, celestial equator, glenoid, distal, inferior vena cava, subpopulation, cluster, ellipsoids, checkmark, adventitia, subregions, papillary muscle, decile, subscript, apse, cepheid variable, spadix, trapezoid, cepheus, longways, transept, fornix, divisors, adjacency, zones, category, chevron, sacrum, aortic arch, crosshair, innominate, foramen, magnetic declination, inner, galactic plane, horseshoe, sulcus, tympanum, semicircles, synchronous orbit, papule, quadrants, half, quarter, hemisphere, wall, comer, limb, shelf, side, third, compartment, aisle, branch, edge, portion, prong, abutment, drawer, scan, component, curve, example, flop, 4-5, 9-10, amplifier, correlation, grid, multiplier, start, synchronous, vector, 2-4, 4-1, coefficient, combinational

oxtant, zone fire

straight angle

angular unit, area, country, line, measuring instrument, measuring system

quarter-circle, right angle