Circles, sectors and arcs - Edexcel ... are used to calculate angles and lengths in right-angled triangles. The sine and cosine rules calculate lengths and angles in any triangle.

the two triangles are similar. Tangent to a circle at, point of contact (Prove) The tangent at any point of a circle is perpendicular to the radius through the point of contact. (Prove ...

Here you get the CBSE Class 10 Mathematics chapter 11 ... The largest triangle that can be inscribed in a semi-circle is the one formed by joining two end points of diameter AB to a point C ...