# IS triangle

Calculate interior angles of the isosceles triangle with base 40 cm and legs 22 cm long.

α = β =  24.6 °
γ =  130.8 °

### Step-by-step explanation:

$\alpha =\beta =\mathrm{arccos}\left(\frac{40}{2\cdot 22}\right)=24.{6}^{\circ }$
$\gamma =2\mathrm{arcsin}\left(\frac{40}{2\cdot 22}\right)=130.{8}^{\circ }$

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