Q. Can the sides of a triangle have lengths 2, 9, and 10?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+9: Check if 2 + 9 > 10. Calculation: 2+9=11, and 11 > 10, so this part is true.
Check 2+10: Check if 2 + 10 > 9. Calculation: 2+10=12, and 12 > 9, so this part is true.
Check 9+10: Check if 9 + 10 > 2. Calculation: 9+10=19, and 19 > 2, so this part is true.