Mathematics 10 — Exercise 9.2 · Q2 (ii)

Full question

Angle BDC=74°. Find central angle BOC.

Step-by-step solution

1. The angle at the centre is twice the angle at the circumference standing on the same arc.

2. Substitute the given numbers into the formula.

   $$2\times 74$$

3. Calculate this operation before combining the remaining terms.

   $$2\times 74=148$$

4. The required result is shown below. Unit: °

   $$148$$

Answer

The final answer is shown below.