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How many triangles can you form from the vertices of a heptagon ABCDEFG? How many of these triangles formed have A as one of its vertices? After I enter in all my values into L1 and L2 and try to calculate the LSRL it says error. Stat on my ti 84 plus calculator. Please help.? Identify the oxidizing and reducing agent in the reaction 2Cu2++4I−→2CuI+I2? How do i find the area of the sector? Mostre que o angulo que o ponteiro das horas descreve, em graus, é a metade do numero que marca os minutos.?