What is the value of x?

5

Step-by-step explanation:

Since this is a right triangle, we can use the Pythagorean theorem

a^2 + b^2 =c^2  where a and b are the legs and c is the hypotenuse

x^2 + 12^2 = 13^2

x^2 +144 =169

Subtract 144 from each side

x^2 +144-144 =169-144

x^2 = 25

Take the square root of each side

sqrt(x^2) = sqrt(25)

x=5

answer: 12

step-by-step explanation:

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.