Division of a Line Segment ,Construction of Tangents to a Circle,To construct a triangle similar to a given triangle as per given scale factor,To construct the tangents to a circle from a point outside it.
You will learn to do the following constructions :
1. To divide a line segment in a given ratio.
2. To construct a triangle similar to a given triangle as per given scale factor which may be less than or may be greater than 1.
3. To construct tangent at a point on a given circle.
4. To construct the pair of tangents from an external point to a circle
Steps of construction(i) With O as the centre draw a circle of radius 3.2 cm.
(ii) Take a point P on the circle and join OP.
(iii) Draw an arc of a circle with centre at P cutting OP at L.
(iv) Mark M and N on the arc such that m(arc L M ) = m(arcMN)
(v) Draw the bisector PT of the angle <MPN
(vi) Produce TP to Tlto get the required tangent T'PT.
10th Geometry topic -Construction [Guess Question paper for CBSE Board]