Pacific,arctic, and atlantic oceans
Because the time span of Earth's past is so great, geologists use the geologic time scale to show Earth's history.
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While equaling the two angles, we find that x=7. When we plug in 7 for x, we get that each angle adds to 24 so the measure of XWY is 48.
<span>Mass extinctions when at least half of all species die out. The largest mass extinction event occurred around 250 million years ago, when perhaps 95 % of all species went extinct. Now new ones appeared.
It was during Cretaceous.
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Photon</span>
