Find the area of this figure. Sides meet at right angles

51?

Warning!:

I might be wrong because I haven't done this in a long time, so make sure to double-check.

Other than that, I hope this helps!

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.