Why are arrowheads important in dimensioning?

Arrowheads are crucial in dimensioning because they clearly indicate the exact points between which a measurement is being taken. This precision is vital in technical drawings, as it helps designers, engineers, and manufacturers understand the exact dimensions and spatial relationships of the elements being illustrated.

Utilizing arrowheads at the end of dimension lines helps to avoid ambiguity in a drawing, ensuring that everyone interpreting the document knows exactly where to measure from and to. By directly pointing to the features or points being dimensioned, arrowheads facilitate accurate communication of measurements, which is essential in producing high-quality and functional designs.

The other options do not address this critical function: decorative features, large measurements, and angle representation are not relevant to the primary purpose of arrowheads in dimensioning, which is to provide clarity and precision in the communication of measurements.