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Tsohtan · Answer 1 · 2018-05-02T19:43:13+0000

"Complementary" angles sum to 90°.

Since we are using minutes as well...

80°+d°+25'+m'=90° subtract 80° from both sides

d°+25'+m'=10° subtract 25' from both sides

d°+m'=9°+60'-25'

d°+m'=9°+35'

9°35'

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