Rubberized 33173

Jaro had 4 angles written in his notebook, the sum of which was a right angle. The little sister rubberized one corner of it. Determine its size if the remaining angles remain written in the notebook: 12°34, 34°56, 56°9.

Correct answer:

D =  76.35 °

Step-by-step explanation:

A=12+34/60=3037712.5667  B=34+56/60=1552434.9333  C=56+9/60=201123=56.15   A+B+C+D 180°  D=180ABC=18012.566734.933356.15=76.35=76°21

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