Respuesta :

Answer:

Step-by-step explanation:

The area formula for a trapezoid is

[tex]A=\frac{1}{2}h(b_1+b_2)[/tex]

A is 186, h is 12, b1 is 14:

[tex]186=\frac{1}{2}(12)(14+b)[/tex] and

186 = 6(14 + b) and

186 = 84 + 6b and

102 = 6b so

b = 17

The other base is 17

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