Q. Can the sides of a triangle have lengths 2, 4, and 5?Choices:(A) yes(B) no
Triangle Inequality Theorem: To determine if these can be the sides of a triangle, we need to check the triangle inequality theorem. The sum of the lengths of any two sides must be greater than the length of the third side.
Check 2+4: Check if 2 + 4 > 5. Calculation: 2+4=6, and 6 > 5, so this part is true.
Check 2+5: Check if 2 + 5 > 4. Calculation: 2+5=7, and 7 > 4, so this part is true.
Check 4+5: Check if 4 + 5 > 2. Calculation: 4+5=9, and 9 > 2, so this part is true.