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Find the value of the variable ??

Find the value of the variable ??-example-1
User Sotsir
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Answer:

7

Step-by-step explanation:

The triangle is a special right triangle.

Since it has a 45° in one of the two unknown angles, the other angle is also 45°. This is called a 45-45-90 right triangle.

The rule for that special triangle is that the legs measure the same while the hypotenuse measures a multiplication of √2.

Since one leg is labeled 7 units, the other (which is x) is labeled 7 too.

User Pervy Sage
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