Question

11. If the perimeter of the given triangle is more than 22 cm and less than or equal to 30cm. express it in inequality and solve it.​

Answer 1

5 < x ≤ 7

Explanation:

perimeter = 2x + x + x + 2 = 4x + 2

perimeter is more than 22 so 22 is less than perimeter , then

22 < 4x + 2 ≤ 30 ( subtract 2 from each interval )

20 < 4x ≤ 28 ( divide each interval by 4 )

5 < x ≤ 7