Isosceles Triangle, Theorems and Problems - Table of Content 7

Proposed Problem 372.
Circles, Common Internal and External Tangent, Angles.
Isosceles triangle.

Proposed Problem 358.
Isosceles triangle 80-80-20, Circle, Angles, Congruence.

Proposed Problem 274.
Isosceles Triangle, 80-80-20, Angles.

Proposed Problem 224. Viviani's theorem, Isosceles triangle, Altitude, Distances, Point on the extension of the base.

Proposed Problem 223. Viviani's theorem, Isosceles triangle, Altitude, Distances.

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