In an isosceles triangle ABC (AC = BC) the sum of the base and the leg is 14 cm, and the cos of the angle at the base is 1/5. Find the height of BB1 and the cosine of the angle ABB1.

In an isosceles triangle ABC (AC = BC) the sum of the base and the leg is 14 cm, and the cos of the angle at the base is 1/5. Find the height of BB1 and the cosine of the angle ABB1.
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1 Answer

Is it AC=BC or AB=AC
by Level 8 User (30.1k points)

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