Explanation:
The perimeter of a triangle is calculated by adding all three side lengths together
That means x + 4 + x + x + 2 = 21 ft add the like terms
3x + 6 = 21 ft subtract 6 from both sides
3x = 15
x = 5
RS = x ➡ 5
ST = 4 + x ➡ 9
RT = x + 2 ➡ 7
Answer:
x = 5 ft
RS = 5 ft
ST = 9 ft
RT = 7 ft
Perimeter is the sum of all sides.
(x+2) + (4+x) + (x) = 21
3x + 6 = 21
3x = 21 - 6 = 15
x = 15/3 = 5
RS = x = 5
ST = 4 + x = 4 + 5 = 9
RT = x + 2 = 5 + 2 = 7
9.4m questions
12.2m answers