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## Answers

The Brainliest Answer!

Let x be the smallest angle in degrees.

Since 9 cm is the shortest side, the angle opposite it is the smallest.

(13)² + (17)² - (9)²

cos X = -----------------------

2 (13) (17)

169 + 289 - 169

= -------------------------

442

377

= --------

442

= 0.85294

cos ⁻¹ (0.85294) = 31.4671 or 31.5°

**ANSWER: The smallest angle is 31.5°.**

Use the same formula to find the measurements of the other two angles. The sum must be 180°. :-)

(Note: I edited because at first I misread 9 cm as 19, it's blurred or shadowed. I found out it's only 9 when I checked again in enlarged photo.)