Draw an isosceles triangle with each of equal sides of length 3 cm and the angle between them as 45°.

The steps are as follows:

1. Draw a line AB of side 3 cm

2. Construct 45° at point B and draw a straight line through it. 45° angled line can be constructed by taking same distance from B towards A [X] and towards the 90° [Y] line. Then cut the arc from the two points.

3. From point B cut an arc at 45° line of length 3 cm.

4. The point where arc intersect with 90° line is the third point of triangle, C.

5. Join AC to complete the triangle.