Trapezoid ABCD is a cross section of a lampshade. The diagonals of trapezoid ABCD are congruent, and the measure of B?

i think that you should ask google for the answer to that problem because if we don't know it google does

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.  

triangle and cube

step-by-step explanation:

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

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