If ABC = DEC, <B = 3x and <E =
6x - 39
what is x?
please show work​

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical