An isosceles triangle has 2 equal sides and 2 equal angles
y = 15
To find x apply Pythagorean theorem:
c^2 = a^2 + b^2
where:
c= hypotenuse
a&b= the other two legs of the triangle:
x^2 = 15^2 + 15^2
x ^2 = 225 + 225
x^2 = 450
x = √450
x= 21.21
One given angle is a right angle (90°).
The sum of interior angles of a triangle is 180°.
90 + A + B = 180
A=B
90 +2A=180
2A= 180-90
2A=90
A=90/2
A=45
B= 45
A=45
B=45
x= 21.21°
y= 15