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Proving a Triangle Is Isosceles

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Explanations 1

Converse of isosceles triangle As in properties of isosceles triangles (Isosceles Triangle Theorem), it's important to note that it is not immediately obvious that A triangle ha…
By Ray Li, Victor Wang, Victor Wang

Problems 1

In triangle ABCABCABC, angle AAA has measure 180∘−2∠C180^\circ - 2\angle{C}180∘−2∠C. If AC=3AC = 3AC=3 and BC=2BC = 2BC=2, find the perimeter of triangle ABCABCABC.