# Geometry Problems 1371-1380. Level: High School, College

 Geometry Problems 1371 - 1380 Geometry Problem 1372.Equilateral Triangle, Exterior Cevian, Inradius, Exradius, Altitude, Sketch, iPad Apps. Geometry Problem 1373.Isosceles Triangle, Exterior Cevian, Inradius, Exradius, Altitude to the Base. Geometry Problem 1374.Isosceles Triangle, Exterior Cevian, Incircle, Excircle, Tangency Points, Parallel Lines. Geometry Problem 1375.Isosceles Triangle, Interior Cevian, Exradius, Excircle, Altitude to the Base. Geometry Problem 1376.Isosceles Triangle, Interior Cevian, Excircles, Tangency Points, Parallel Lines. Geometry Problem 1377.Isosceles Triangle, Interior Cevian, Equal Sum of Exradii, Excircle. Geometry Problem 1378.Parallelogram, Diagonal perpendicular to a side, Distances from a Point to Vertices, Measurement. Geometry Problem 1379.Common External Tangents. Circles, Secant, Congruent Chords. Geometry Problem 1380.Common Internal Tangents. Circles, Secant, Congruent Chords. Geometry Problem 1381.Parallelogram, Exterior Point, Triangle, Area. Geometry Problem 1382.Circle, Diameter, Radius, Perpendicular, Congruence. Geometry Problem 1383.Triangle, Median, Circle, Chord, Secant, Sum, Product. Geometry Problem 1384.Triangle, Orthocenter, Circle, Circumcircle, Angle Bisector, 90 Degree. Geometry Problem 1385.Triangle, Orthocenter, Circle, Circumcircle, Angle Bisector, Midpoint, Collinear Points. Geometry Problem 1386.Thabit ibn Qurra (826 -901) Theorem and more conclusions, generalized Pythagorean Theorem to any triangle. Geometry Problem 1387.Quadrilateral, Double Angle, Congruence, Isosceles Triangle.

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Last updated: Sep 21, 2018