Draw a triangle ABC with sides `BC=6cm, AB= 5cm` and `angleABC=60^(@)`. Then connstruct a triangle whose sides are `(3)/(4)` of the corresponding sides of the triangle ABC.

Draw a triangle ABC with side BC=7cm, angleB=45^(@), angleA=105^(@) . Then construct a triangle whose side are (4)/(3) times the corresponding sides of DeltaABC .

In each of the following give the justification of the construction also : Construct a triangle with sides 5cm, 6cm and 7cm and then another triangle whose sides are (7)/(5) of the corresponding sides of the first triangle.

Construct a triangle of sides 4cm, 5cm and 6cm and then a triangle similar to it whose sides are (2)/(3) of the corresponding sides of it.

Construct a triangle ABC where BC = 6.5 cm, CA + AB = 10 cm and angleB = 60^@ .

Draw a right triangle in which the sides (other than hypotenuse) are of lengths 4cm and 3cm. Then construct another triangle whose sides the (5)/(3) times the corresponding sides of the given angle.

Construct an isosceles triangle whose base 8cm and altitude 4cm and then another triangle whose sides are 1(1)/(2) times the corresponding side of the isosceles triangle.

Find the area of a triangle whose sides are 3 cm, 4 cm and 5 cm.