# It is rectangular?

Size of two of the angles in a triangle are: α=110°, β=40°.

Is it a right triangle?

Result

#### Solution:

$\alpha=110 ^\circ \ \\ \beta = 40 ^\circ \ \\ \alpha + \beta + \gamma = 180 ^\circ \ \\ \gamma = 180 ^\circ - \alpha - \beta \ \\ \gamma = 30 ^\circ$

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