Sagot :
Concept:-
The sum of two sides of a triangle is greater than the third side of the triangle.
Answer:-
The sides of triangle are
- 4mm
- 5mm
Finding sum
[tex]\\ \sf\longmapsto 4+5=9mm[/tex]
Here in options
- 7<9
- 8<9
- 9=9
- 10<9
Hence option D is the answer.