Answer:
x = approx. 25.7 and y = 12
Step-by-step explanation:
Isosceles triangles have 2 equal sides and 2 equal angles and there are 180 degrees in a triangle.
3x + 3x + x = 180
7x = 180
x = approx. 25.7
3(25.7) + 3(25.7) + 25.7 = 180
77.1 + 77.1 + 25.7 = 180
179.9 approx. = 180
7y + 7y + y = 180
15y = 180
y = 12
7(12) + 7(12) + 12 = 180
84 + 84 + 12 = 180
180 = 180
