Answer:
- The base angles of an isosceles triangle are the angles formed by the base and one leg of the triangle. The base angles theorem converse states if two angles in a triangle are congruent, then the sides opposite those angles are also congruent.
- Pythagoras theorem states that “In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares of the other two sides“.

What is the value of x in the triangle?
A. 7
B. 14
✓C. 7√2
D. 7√2/2
C. is the right answer.