Respuesta :

Answer:

E) 70

Step-by-step explanation:

Using combination factorial

a triangle has three vertices and a quadrilateral has 4 vertices

The number of triangles and quadrilaterals = ⁷C₃ + ⁷C₄ = [tex]\frac{7!}{4!3!} + \frac{7!}{4!3!}[/tex] = 70

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