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The two congruent sides of an isosceles triangle. The angle made by the intersection of the legs of an isosceles triangle. The non-congruent side of an isosceles triangle. (Base does NOT mean it's got to be at the bottom). The angles formed by the base and legs of an isosceles triangle. ∠C.
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The two congruent sides of an isosceles triangle. The angle made by the intersection of the legs of an isosceles triangle The non-congruent side of an isosceles triangle (Base does NOT mean it's got to be at the bottom) The angles formed by the base and legs of an isosceles triangle.
∠C AC F G
equiangular equilateral equilateral equiangular 180 60 60
equiangular equilateral JL 8 ∠MJL LJ 8 LJ 8 8 4
∠DCA Corollary to the equiangular Converse of Base Angles Theorem ∠ACB AAS ≅ Theorem
∠H ≅ ∠J 15 Since ∆DCA is equilateral and ∆DCA ≅ ∆BAC, both angles BAC and DAC are 60. m∠BAD = m∠BAC + m∠DAC m∠BAD = 60 + 60 m∠BAD = 120