# IS triangle

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

Correct result:

α = β =  24.6 °
γ =  130.8 °

#### Solution:

$\alpha = \beta = \arccos( \dfrac{ 40 }{ 2 \cdot 22} ) =24.6 ^\circ$
$\gamma = 2 \arcsin( \dfrac{ 40 }{ 2 \cdot 22} ) =130.8 ^\circ$

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