triangle PAB is formed by three tangents to circle with centre O and angle APB = 40degree, then angle AOB = ??
From the figure,
∠APB =
⇒∠APB+∠AOB = [the sum of angles supplementary is ]
⇒+∠AOB =
⇒∠AOB =-
⇒∠AOB =
triangle PAB is formed by three tangents to circle with centre O and angle APB = 40degree, then angle AOB = ??
From the figure,
∠APB =
⇒∠APB+∠AOB = [the sum of angles supplementary is ]
⇒+∠AOB =
⇒∠AOB =-
⇒∠AOB =