An isosceles trapezoid has base angles of 45° and bases of lengths 9 and 15. the area of the trapezoid is

36

Step-by-step explanation:

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in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8