Video narration
How do you place four sides accurately, instead of guessing where each corner goes? Think of connecting dots in your notebook: fix the points, then join them. A quadrilateral gets easier when diagonal AC divides it into two triangles. Draw the given diagonal AC. For triangle ABC, draw an arc from A using AB, and an arc from C using BC. Their intersection is B. Now construct the other triangle. From A, draw an arc using AD; from C, draw one using CD. Choose their intersection on the opposite side of AC. That point is D. Use your ruler to join A to B to C to D to A. Finally, check AB, BC, CD, and DA against the given lengths. If the measurements are compatible and the sides match, the answer is clear: one diagonal creates two triangles, and joining their outer points places the quadrilateral accurately.