and AC are tangents to the circle, centre O. AO is a straight line passing through BC at D. If AO 10.8 cm and OC = 4.3 cm find B a). AC, b). AB, D A c). ∠BAO, d). ∠AOB, e). OD, f). BD, g). ZOBD, h). ∠DBA.

Point O is the centre of the circle shown. Line segment AB is 20 units long, line segment CF is 4 units long, and line segment ED is 3 units long. Segments AC, AD, and CD are tangent to the circle at points B, E, and F, respectively. The perimeter of ΔACD isa27 units b50 unitsc51 units d54 units

is a diameter of a circle with centre  O  and radius  OD  is perpendicular to  AB . If  C  is any point on arc  DB , then the value of  ∠BAD  and  ∠ACD  is

Isosceles triangle ABC, with AB = BC, is inscribed in a circle with center O.If angle OBC = 10°, what is the measure of angle ACO?A) 10°B) 70°C) 80°D) 160°

A triangle ABC is drawn to circumscribe a circle of radius4cm such that the segments BD and DC into which BC isdivided by the point of contact D are of lengths 8 cm and 6cm respectively (see fig). Find the sides AB and AC

AB is a chord of the circle with centre O AOC is the diameter and AT is the tangent at A. Proove that angle BAT = angleACB (use alternate angle to proove)