The largest angle of a triangle is 80°, what fraction of the sum of the interior angles of the triangle? What kind of triangle is it?
一个三角形最大的角是80°，占这个三角形内角和的几分之几？它是什么三角形？
<gadget id="calculator">80 / 180</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>