McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
3. Special Right Triangles
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Exercise 5 Page 644

Notice that the given figure is a 30^(∘)-60^(∘)-90^(∘) triangle.

x=14, y=7sqrt(3)

Practice makes perfect

Notice that the given right triangle has a marked angle measuring 30^(∘). Therefore, by the Triangle Angle Sum Theorem the measure of the third angle must be 60^(∘).

In a 30^(∘)-60^(∘)-90^(∘) triangle, the longer leg is sqrt(3) times the length of the shorter leg. y=sqrt(3)* 7 ⇔ y=7sqrt(3) Also, in a 30^(∘)-60^(∘)-90^(∘) triangle, the hypotenuse is 2 times the length of the shorter leg. x= 2 * 7 ⇔ x=14