The diagram shows the triangle OCD with OC = OD = 17 cm and CD = 30 cm. The midpoint of CD is M. A semicircular arc A₁, with centre M is drawn, with CD as diameter. A circular arc A₂ with centre O and radius 17 cm, is drawn from C to D. The shaded region R is bounded by the arcs A₁ and A₂. Calculate, giving answers to 2 decimal places:

a. The area of the triangle OCD

b. The area of the shaded region R.

Transcribed Image Text:

C 17 cm M R A₂ 17cm D