Answer:
x=48
y=70
Step-by-step explanation:
Key skills required are triangles, isosceles triangles, one variable equations, interior angle sums
1) You have to start with the fact that the triangle is isosceles. This means that the 2 base angles (x+7 and 55) are equal to each other.
An isosceles triangle has 2 sides equal and 2 angles equal.
2) With the explanation above --> x+7=55
3) Subtract 7 from both sides and you will get x=48
4) The sum of all the angles in a triangle is 180 degrees. The two bottom angles are 55 degrees each, making their sum 55+ 55= 110 degrees.
5) 110 degrees + y degrees = 180
6) subtract 110 from both sides and y would equal 70.
Hope you understood and have a nice day!! :D
