Explanation:
Hey there!
Given that it is isosceles, so the height and bases are 2 units.
So, we can apply Pythagoras Theorem.
So, The required answer is 
units.
And hence c part.
Hope it helps :)
Answer:
The battle Lexington and Concord was the first major battle in the American Revolution.
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In West Africa<span>, the three most </span>important<span> empires were </span>Ghana<span>, </span>Mali, and Songhai<span>, all of which profited tremendously from the trans-Saharan gold trade. ... Their territorial holdings were eventually larger than either </span>Mali<span> or </span>Ghana<span>, until civil war irreparably weakened the empire.</span>
