Wednesday

August 27, 2014

August 27, 2014

Posted by **abc Please help URGENT** on Saturday, May 4, 2013 at 2:59am.

- Math -
**Reiny**, Saturday, May 4, 2013 at 8:09amThe angle between a tangent and the chord at their point of contact is equal to half the angle at the centre.

So once we find angle BAP it should not be that bad

In right-angled triangle ABP , P = 90°

let angle BAP = Ø

sinØ = 8/48 = 1/6

Ø = 80.4°

so 2Ø or central angle = 160.8

In triangle AOB , where O is the centre, and OA = OB = radius

angle OBA = 9.59°

by the sine law:

OB/sin9.59° = 48/sin160.8°

OB = 24.3

The radius is 24.3 units

**Related Questions**

Maths - G is a circle with chord AB. P is a point outside of G such that PA is ...

Radius - Γ is a circle with chord AB. P is a point outside of Γ such ...

GEOMETRY CIRCLE - 1.An isosceles triangle with each leg measuring 13 cm is ...

GEOMETRY CIRCLES PLEASE - 1.An isosceles triangle with each leg measuring 13 cm ...

GEOMETRY CIRCLES PLEASE - HELP ME PLEASE. 1.An isosceles triangle with each leg...

GEOMETRY CIRCLES - 1. Ab is a chord of a circle with center o and radius 52 cm...

Geometry about the circles - 1. Ab is a chord of a circle with center o and ...

Geometry about the circles - 1. Ab is a chord of a circle with center o and ...

Math - P is a point outside of circle Γ. The tangent from P to Γ ...

geometry - two concentric circles with center E, AB = 40 CD = 24, CD is ...