# From Twinkle Twinkle Little Star

Geometry Level 5

Find, in degrees, the sum of the marked angles.

Remark: The above diagram consists of 19 points, $$A_0, A_1, \ldots, A_{18}$$, there are 19 line segments of form $$A_{i}A_{i+7}$$, where the subscripts read modulo 19.

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