In the figure given below, AB is diameter of the circle whose centre is O. given that: ∠ECD = ∠EDC = 32°. Show that ∠COF = ∠CEF.
Here, ∠COF = 2 ∠CDF = 2 × 32° = 64° ……… (i) (Angle at the centre is double the angle at the circumference subtended by the same chord) In ΔECD, ∠CEF = ∠ECD +∠EDC = 32° +32° = 64° ………….(ii) (Exterior angle of a Δ is equal to the sum of pair of interior opposite angles) From (i) and (ii), we get ∠COF =∠CEF
Solution In the Figure Given Below, Ab is Diameter of the Circle Whose Centre is O. Given That: ∠Ecd = ∠Edc = 32°. Show that ∠Cof = ∠Cef. Concept: Arc and Chord Properties - the Angle that an Arc of a Circle Subtends at the Center is Double that Which It Subtends at Any Point on the Remaining Part of the Circle.