In a triangle ABC, ∠A is 50°, what is the sum of the degrees of ∠B plus angle ∠C?
在一个三角形中ABC中，∠A为50°，则∠B加角∠C的度数和为多少度．
<gadget id="calculator">180 - 50</gadget>
<output>130</output>

<result>130</result>