Question

In the given figure, AB and CD are diameters, ∠COB= 30° and OC=2.1 cm. Find the area of the shaded portion.​

Answer 1

Beginning in the 6th century BC with the Pythagoreans, the Ancient Greeks began a systematic study of mathematics as a subject in its own right with Greek mathematics. Around 300 BC, Euclid introduced the axiomatic method still used in mathematics today, consisting of definition, axiom, theorem, and proof.