The base angle of an isosceles triangle measures 54 degrees. What is the measure of its vertex angle?
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Answer:
Step-by-step explanation:
For this exercise you must use the followinG Trigonometric Identity:
In this case, given the right triangle PQR, you can identify that:
Then, the next step is to substitute those values into :
And the final step is to solve for "QR" in order to find its value.
So you get that this is:
