Practice — what type is this question? (Euclidean Geometry)

Read each question and decide what type it is before revealing the answer.

Grade 11Paper 2Level 3 — Complex Procedures

9.2 O is the centre of circle ABD. F is a point on chord AB such that DOF ⊥ AB. AB = FD = 8 cm and OF = x cm. Determine the length of the radius of the circle.

Source: DBE Mathematics Paper 2, Grade 11, November 2017, Question 9.2

Grade 11Paper 2Level 2 — Routine Procedures

AB is a diameter of the circle with centre O. C is a point on the circle, and angle BAC = 35°. Calculate the size of angle ACB, and give a reason.

Practice question — not sourced from a past paper.

Grade 11Paper 2Level 2 — Routine Procedures

A, B, C and D lie on a circle, with C and D on the same side of chord AB. Angle ACB = 50°. Calculate the size of angle ADB, and give a reason.

Practice question — not sourced from a past paper.