Interior angles in a triangle add up to 180˚. Triangles close triangleA polygon with three straight sides. have three sides, therefore they have three angles. Interior angles in a triangle sum to a ...

A right triangle is a special type of triangle that has one angle measuring 90 degrees. In this article, we will look at how to calculate the other two angles of a right triangle using trigonometry ...

Choose a polygon, and reshape it by dragging the vertices to new locations. As the figure changes shape, the angle measures will automatically update. Animation: For triangles and quadrilaterals, you ...

Do you think there’s a triangle whose angles measure 41, 76 and 63 degrees? At first, answering this may seem easy. From geometry class we know that the sum of the measures of the interior angles of a ...