Save guides, add subjects and pick up where you left off with your BBC account. The angle on a straight line is 180°. The angle VOY = 180°. The angle at the centre is double the angle at the ...

Save guides, add subjects and pick up where you left off with your BBC account. Calculate the missing angles \(x\), \(y\) and \(z\). The angle in a semicircle is 90°.