For a right-angled triangle, follow these steps to calculate the length of a side, \(x\), when another side and an angle Ɵ is given: Formula triangles ... and round to 1 decimal place to give ...

The formula for calculating the size ... times 180 = 720^\circ\). One interior angle is \(720 \div 6 = 120^\circ\). If the side of a polygon is extended, the angle formed outside the polygon ...