A shape pattern consists of rectangles and triangles. Shape 1 has 1 rectangle and 1 triangle, Shape 2 has 2 rectangles and 3 triangles, and Shape 3 has 3 rectangles and 5 triangles. If this pattern continues, how many triangles are there in the shape with 50 rectangles?
1 )
50
99
3 )
100
4 )
101
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