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What is the vertex angle of an isosceles triangle whose equal sides are 15 meters long if the area is 112.5 square meters?
Wiki User
∙ 11y ago
Area = 0.5*a*b*sin(C)
so
112.5 = 0.5*15*15*sin(c)
1 = sin(C)
so C = pi/2 radians (or 90 degrees).
Wiki User
∙ 11y ago
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