Answer:
12
Explanation:
ABC is a right triangle.
AC = 4
CB = 3
The legs have lengths of 4 and 3.
Now we use the Pythagorean theorem to find AB, the length of the hypotenuse.
a² + b² = c², for legs a and b, and hypotenuse c.
(AC)² + (CB)² = (AB)²
4² + 3² = (AB)²
16 + 9 = (AB)²
25 = (AB)²
AB = 5
perimeter = sum of lengths of sides
perimeter of triangle ABC = AC + CB + AB
perimeter = 4 + 3 + 5
perimeter = 12