What is the measure of angle x?

Mathematics
Tutor: None Selected Time limit: 1 Day

Nov 4th, 2015

Thank you for the opportunity to help you with your question!

Since the given triangle has all the three sides equal the triangle is eqilateral and in a eqilateral triangle the angle at each vertex is  degrees.

To prove it mathematically by law of cosines a^2=b^2 + c^2 -2 bc cos(A)

where a,b,c are length of sides of triangle and A is the angle at vertex A.

by applying the condition that a=b=c we get cos(A)=1/2

hence angleA is 60degress

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 4th, 2015

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