The angle at the circumference in a semi-circle is 90°. Angle STU = 90° Angles in a triangle add up to 180°. The angle on a straight line is 180°. The angle VOY = 180°. The angle at the centre is ...
You can find more maths past papers and mark schemes on the CCEA website. Papers going back as far as 2018 are available there, in both standard and modified versions ...