What is the perimeter and height of a triangle that has a base length of 15cm with base angles of 28.67 degrees and 15.5 degrees?

What is the perimeter and height of a triangle that has a base length of 15cm with base angles of 28.67 degrees and 15.5 degrees?
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Using the sine formulae of a/A=b/B=c/C and A/a=B/b=C/c intrigonometry the perimeter of the triangle is 31.08 cm with aheight of 2.76 cm both rounded to two decimal places.
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