Calculate Deltoid Area: Finding Area with Height 5 and Base 16

To find the area of the deltoid ABCD, we use the external height formula for deltoids:

Given:
- Height ($h$) = $16$ cm
- Segment related to base ($b$) = $5$ cm

The area of the deltoid can be calculated by:

$\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$

Plugging in our values, we have:

$\text{Area} = \frac{1}{2} \times 5 \times 16$

Calculating the result:

$\text{Area} = \frac{1}{2} \times 80 = 40$ cm$^2$

Therefore, the area of deltoid ABCD is $40$ cm$^2$.