# maths-circles

posted by anoynomous

a circle having a centre O has a triangle PQS inside it with the base QP is not on centre O. PT and QT are two tangents from an exterior point T (S, O and T are linear points - lie in one line )
it is given that angle ptq = 25 deg . find angle PSQ and OPQ

1. Steve

Take a look at paragraph 5 of

http://www.regentsprep.org/Regents/math/geometry/GP15/CircleAngles.htm

## Similar Questions

1. ### geometry

Theres a circle with an equilateral triangle in the middle. The traingles edges all touch the circle. The radius of the circle is 8 meters. How do I find the area of the triangle?
2. ### Math

Two lengths are drawn from a Point P to a circle centre (o). The radius of the circle is 8.2cm and P is 12.4cm from o. Find the angle between the tangents. Please help, I really don't understand it.
3. ### maths

in the following fig two tangents PQ and PR are drawn to a circle with centre O from an external point P.prove that QPR=2OQR

PLEASE HELP I REALLY NEED HELP. Each of the three circles in the figure below is externally tangent to the other two, and each side of the triangle is tangent to two of the circles. If each circle has radius three, then find the perimeter …
5. ### maths-Circles

O is the centre of a circle which has two chords BA and BC with point B on the circumference of the circle.If OB bisects angle ABC,prove that AB=AC
6. ### maths-Circles

There are two equal chords AB and and CD of a circle whose centre is O , when produced meet at point E. prove that EB=ED and EA=EC
7. ### maths-circles

a circle with centre O, secants AB and EF intersect each other at point C in the exterior of the circle . prove that measure of angle ACE=(1/2)*{measure of arcAE)-measure of arc BF}
8. ### maths

A number of circles touch each ather. The area of the smallest circle is 4n cm^2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many …
9. ### math

) A chord AB of length 13cm is drawn in a circle centre O at a distance of 5cm from O. Find the radius of the circle. Stop at 1 d.p.(b) TA and TB are tangents to a circle centre O. TOC is a straight line and <ATB = 56°. Calculate …
10. ### Math

You can use triangle congruence theorems to prove relationships among tangents and secants. Task 1 Four tangents are drawn from E to two concentric circles. A, B, C, and D are the points of tangency. Name as many pairs of congruent …

More Similar Questions