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Geometry Problems 661-670: Triangle, Circle, 60 Degrees, Incenter, Circumcenter, Orthocenter,
Parallelogram, Metric Relations, Congruence, Similarity
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Geometry Problems 661 - 670
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![Intersecting Circles](../problem/p661_intersecting_circles_1.jpg) |
Geometry Problem 661.
Intersecting Circles, Centers, Secant, Parallelogram. |
![Triangle Centers, Angles](../problem/p662_triangle_angle_1.jpg) |
Geometry Problem 662.
Triangle, Incenter, Circumcenter, Orthocenter, Circle, Angle, Measurement. |
![Triangle, 60 Degrees, Concurrent lines](../problem/p663_triangle_60_degrees_1.jpg) |
Geometry Problem 663.
Scalene Triangle, 60 Degrees, Altitude, Angle Bisector, Perpendicular Bisector,
Concurrent lines. |
![Triangle, 60 Degrees, Centers, Angles](../problem/p664_triangle_60_degrees_1.jpg) |
Geometry Problem 664.
Triangle, 60 Degrees, Orthocenter, Incenter, Circumcenter, Angles,
Triangle centers. |
![Intersecting circles](../problem/p665_intersecting_circle_1.jpg) |
Geometry Problem 665.
Intersecting Circles, Secant, Tangent, Angles, Mind Map. |
![Intersecting circles](../problem/p666_intersecting_circle_1.jpg) |
Geometry Problem 666.
Intersecting Circles, Secant, Tangent, Concyclic points, Mind Map. |
![Intersecting circles, Tangent, Metric Relations](../problem/p667_intersecting_circle_1.jpg) |
Geometry Problem 667.
Intersecting Circles, Secant, Tangent, Metric Relations, Mind Map. |
![Right triangle, Incircles](../problem/p668_right_triangle_1.jpg) |
Geometry Problem 668.
Right triangle, Incircles, Parallel, Common Tangent, Mind Map. |
![Triangle, Circumcircle, Incenter](../problem/p669_triangle_incenter_1.jpg) |
Geometry Problem 669.
Triangle, Circumcircle, Incenter, Midpoint, Collinear points, Mind Map. |
![Triangle, 60 Degrees](../problem/p670_triangle_60_degrees_1.jpg) |
Geometry Problem 670.
Triangle, 60 Degrees, Orthocenter, Incenter, Circumcenter, Congruence. |
![Geometry problems 671-680](geometry_problems_671_680_1.jpg)
![Geometry problems 651-660](geometry_problems_651_660_1.jpg) |
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