Question 419453
How about?
let x = the multiplier
:
13x + 16x + 21x = 180
50x = 180
x = {{{180/50}}}
x = 3.6 is the multiplier
:
The 3 angles:
3.6*13 = 46.8
3.6*16 = 57.6
3.6*21 = 75.6
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total: 180