To construct triangle ABC (AB=3cm, BC=7cm, AC=5cm), draw a straight line AB of 3cm, draw arcs from points A and B with radii 5cm and 7cm respectively. The intersection point is C. Join AC and BC to form the required triangle.
To construct a triangle ABC with given dimensions, follow these steps:
- Draw a straight line AB of length 3 cm using a ruler.
 - Now, with B as the center, draw an arc with radius 7 cm using compass.
 - Similarly, with center A, draw another arc with a 5 cm radius.
 - The point at which the two arcs intersect is point C.
 - Join AC and BC to form the triangle ABC.
 
So, this is how you can construct a triangle using the given dimensions.
Learn more about Triangle Construction