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Solve for x' problem

User Tongfa
by
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1 Answer

7 votes

The basis of each lateral triangle is one-half the difference between the basis of the trapezium:

triangle basis = (1/2)*(21 - 11) = 10/2 = 5

Now, using the Pythagorean Theorem, we have:

x² + 5² = 13²

x² + 25 = 169

To solve this equation, we can apply the same algebraic operations on both sides of the equation:

x² + 25 - 25 = 169 - 25

x² = 144

√x² = √144

x = 12

Therefore, option c is correct.

User Kamo
by
8.9k points

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