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.

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.

Find the area of a triangle whose base is 5 cm and altitude 4 cm.

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 equilateral triangle of side 5.5 cm

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 .

Construct a right triangle whose base is 12 cm and sum of its hypotenuse and other side is 18 cm.