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# help

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In right triangle ABC, the length of side  BC is 2 units, the length of side AC is 4 units and the measure of angle C is 60 degrees. What is the length of side AB , in units? Express your answer in simplest radical form

Nov 20, 2018

#1
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Yay, 30-60-90 triangles!

We can label the figure, by creating the four opposite from 90 degrees and the two across from the 30 degrees. We have to solve for side length AB, which is across from angle 60. Using our knowledge on the triangle, opposite to 60 is $$x\sqrt{3}$$ . Thus, the answer is $$2\sqrt{3}$$ .

Nov 20, 2018

#1
+2

Yay, 30-60-90 triangles!

We can label the figure, by creating the four opposite from 90 degrees and the two across from the 30 degrees. We have to solve for side length AB, which is across from angle 60. Using our knowledge on the triangle, opposite to 60 is $$x\sqrt{3}$$ . Thus, the answer is $$2\sqrt{3}$$ .

tertre Nov 20, 2018
#2
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Nice, tertre.....!!!!   CPhill  Nov 20, 2018
#3
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Thank you, CPhill!  tertre  Nov 20, 2018