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Triangle with Double Angle,
Theorems and Problems - Table of Content
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![Triangle with Double Angle](double_angle_i.jpg) |
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![Geometry Problem 1561](../school-college/6/p1561-highschool-college-geometry-triangle-ABC-circumcenter-orthocenter-angle-parallel-problem-1.jpg) |
Geometry Problem 1561:
Triangle ABC, Circumcenter O, Orthocenter H, Parallel Line, and Angle
Secrets. |
![Geometry Problem 1554](../school-college/6/p1554-triangle-ABC-angles-A-B-altitude-AH-median-AM-length-HM-4-units-length-AB-1.jpg) |
Geometry Problem 1554: Finding the Length of Side AB in Triangle ABC |
![Geometry Problem 1513](../school-college/6/p1513-right-trapezoid-solving-base-double-angle-sum-two-sides-thematic-poem-1.jpg) |
Geometry
Problem 1513 and a Thematic Poem.
Solving the base in a Right Trapezoid with Double Angle and Sum of Two
Sides. Difficulty Level: High School. |
![Geometry Problem 1507](../school-college/6/p1507-discover-isosceles-triangle-doble-angle-measurement-altitude-perpendicular-1.jpg) |
Geometry
Problem 1507.
Understanding Triangle Geometry: Double Angles, Altitudes, and Measurements. Difficulty Level: High School. |
![Geometry Problem 1497](../school-college/5/p1497-triangle-transversal-line-same-ratio-proportionality-double-angle-isosceles-1.jpg) |
Geometry
Problem 1497.
Triangle, Transversal, Same Ratio, Proportionality, Isosceles, Double Angle. |
![Geometry Problem 1496](../school-college/5/p1496-triangle-double-angle-isosceles-30-degree-congruence-1.jpg) |
Geometry
Problem 1496.
Triangle, Congruence, Isosceles, Double Angle, 30 Degrees. |
![Dynamic Geometry 1482](../school-college/5/p1482-right-triangle-double-angle-perpendicular-measurement-1.jpg) |
Geometry
Problem 1482.
Right Triangle, Perpendicular, Double Angle, Measurement. |
![Problem 1387 Quadrilateral, Double Angle, Congruence, Isosceles Triangle](../school-college/4/p1387-quadrilateral-double-angle-isosceles-sum-tutoring-1.jpg) |
Geometry Problem 1387. Quadrilateral, Double Angle, Congruence, Isosceles Triangle. |
![Geometry problem 1336](../school-college/4/p1336-right-triangle-double-angle-90-degrees-tutoring-1.jpg) |
Problem 1336.
Right Triangle, Cevian, Double Angle, Perpendicular, 90 Degrees.
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![Geometry problem 1174](../school-college/2/p1174-triangle-double-triple-angle-bisector-problem-solving-1.jpg) |
Geometry Problem 1174
Triangle, Quadrilateral, Double, Triple, Angle, Congruence, Excenter, Angle Bisector. |
![Geometry problem 1163](../school-college/2/p1163-isosceles-triangle-double-angle-circle-cyclic-problem-solving-1.jpg) |
Geometry Problem 1163.
Isosceles Triangle, Congruence, Double Angle, Circle, Concyclic Points, Circumcenter, Perpendicular, Angle Bisector. |
![Geometry problem 1162](../school-college/2/p1162-triangle-circle-congruence-double-angle-circumcenter-1.jpg) |
Geometry Problem 1162.
Triangle, Congruence, Double Angle, Parallel Lines, Circle, Circumcenter. |
![Geometry Problem 1079](../school-college/1/p1079-isosceles-triangle-quadrilateral-double-angle-class-math-1.jpg) |
Geometry Problem
1079.
Quadrilateral, Isosceles Triangle, Diagonals, Double Angle. |
![Geometry Problem 1028](../school-college/1/p1028-right-triangle-midpoint-double-angle-online-math-1.jpg) |
Geometry Problem
1028.
Right
Triangle, Double, Angle, Midpoint, Congruence. |
![Geometry Problem 1027](../school-college/1/p1027-triangle-isosceles-equilateral-double-angle-online-math-1.jpg) |
Geometry Problem
1027.
Triangle, Double, Quadruple, Angle, Congruence. |
![Geometry Problem 1026](../school-college/1/p1026-right-triangle-triple-angle-90-degree-congruence-online-math-1.jpg) |
Geometry Problem
1026.
Right Triangle, 90 Degrees, Triple Angle, Congruence. |
![Geometry Problem 1025](../school-college/1/p1025-triangle-double-triple-angle-online-math-1.jpg) |
Geometry Problem
1025.
Triangle, Double, Triple, Angle, Interior Point. |
![Geometry Problem 1021](../school-college/1/p1021-triangle-side-cevian-double-angle-math-1.jpg) |
Geometry Problem
1021.
Triangle, Cevian, Double Angle, Sides. |
![Geometry Problem 999](../school-college/p999-right-triangle-double-angle-congruence-math-1.jpg) |
Geometry Problem 999.
Right Triangle, Midpoint, Median, Double Angle, Congruence. |
![Problem 913](../school-college/p913-right-triangle-double-triple-angle-metric-relation-1.jpg) |
Geometry Problem 913.
Right Triangle, Double Angle, Triple Angle, Metric Relations.
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![Problem 912](../school-college/p912-right-triangle-double-triple-angle-perpendicular-1.jpg) |
Geometry Problem 912.
Right Triangle, Double Angle, Triple Angle, Perpendicular Lines.
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![Problem 911](../school-college/p911-right-triangle-double-triple-angle-cyclic-quadrilateral-1.jpg) |
Geometry Problem 911.
Right Triangle, Double Angle, Triple Angle, Concyclic Points, Cyclic Quadrilateral.
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![Geometry Problem 882](../school-college/p882-triangle-cevian-congruence-x-2x-7x-angle-1.jpg) |
Geometry Problem 882
Triangle, Angle x, 2x, 7x, Cevian, Congruence, Auxiliary Lines. |
![Special Right triangle, Catheti or legs ratio 1:3, 18.5 Degrees. Double angle](../school-college/p849-special-right-triangle-catheti-ratio-1-3-angle-18.5-degrees-1.jpg) |
Geometry Problem 849
Special Right triangle, Catheti or legs ratio 1:3, 18.5 Degrees. Double angle. |
![Special Right triangle, Catheti or legs ratio 1:2, 26.5 Degrees. Double angle](../school-college/p848-special-right-triangle-cathetus-1-2-angle-26.5-degrees-1.jpg) |
Geometry Problem 848
Special Right triangle, Catheti or legs ratio 1:2, 26.5 Degrees. Double angle. |
![Isosceles Triangle, Double Angle, Triple Angle, Auxiliary Lines](../school-college/p835-isosceles-triangle-angle-double-triple-auxiliary-lines-1.jpg) |
Geometry Problem 835
Isosceles Triangle, Double Angle, Triple Angle, Auxiliary Lines. |
![Triangle, Double Angle](../problem/p739_triangle_bisector_1.jpg) |
Geometry Problem
739.
Triangle, Double Angle, External Angle Bisector. Congruence. |
![Triaangle, Double-angle, Altitude](../problem/p515_triangle_double_angle.jpg) |
Geometry Problem 515.
Triangle, Double Angle, Altitude, Measure. |
![Geometry problem Triangle with double angle](../problem/p513_triangle_double_angle.jpg) |
Geometry Problem 513.
Triangle, Double Angle, Exterior Angle Bisector, Measure. |
![Online education: Geometry Problem 511](../problem/p511_triangle_double_angle.jpg) |
Geometry Problem 511.
Triangle, Double Angle, Angle Bisector, Measure. |
![Triangle, Angle Bisector, Double Angle](../problem/p498_triangle_bisector_1.jpg) |
Geometry Problem
498.
Triangle, Angle Bisector, Double Angle, Measure. |
![Angles and triangles, 30-60 degrees](../problem/p045_angle_triangle_170.jpg) |
Geometry Problem 45.
Angle,
Double Angle,Triangles, 30-60 degrees. |
![Angles and triangles, 30-60 degrees.](../problem/p044_angle_triangle_170.jpg) |
Geometry Problem 44.
Angles,
Double Angle
and triangles, 30-60 degrees. |
![Angles equal segments, and triangles, 30-60 degrees](../problem/p043_angle_triangle_170.jpg) |
Geometry Problem 43.
Angles,
Double Angle
equal segments, and triangles, 30-60 degrees. |
![Angles equal segments, and triangles, 30-60 degrees](../problem/p042_angle_triangle_170.jpg) |
Geometry Problem 42.
Angles,
Double Angle,
equal segments, and triangles, 30-60 degrees. |
![Right triangle, cevian, angle, congruence](../problem/problem018_triangle_angle_1.jpg) |
Geometry Problem
18.
Right triangle, cevian, Angles,
Double Angle. |
![Right triangle, angle, altitude, degrees](../problem/problem017_triangle_angle_1.jpg) |
Geometry Problem
17.
Right triangle, altitude, Angle,
Double Angle. |
![Triangle, congruence, angles](../problem/problem006_angle_17.jpg) |
Geometry Problem
6.
Triangle, Cevian,
Double Angle, equal segments, and angles
Solutions. |
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