# Angles ratio

In a triangle ABC, is true relationship c is less than b, and b is less than a. Internal angles of the triangle are in the ratio 5:4:9. The size of the internal angle beta is:

β =  50 °

### Step-by-step explanation:

$\beta =5\mathrm{/}\left(5+4+9\right)\cdot 180=50\text{°}$ Did you find an error or inaccuracy? Feel free to write us. Thank you! Tips to related online calculators
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