Perfect Half-Square & Quarter-Square Traingles Ruler
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
1.0.0.20
Perfect Half-Square & Quarter-Square Traingles