In the figure, $\overline{\mathrm{IT}}\parallel \stackrel{\text{\_\_\_}}{\mathrm{YD}}$ and N is the midpoint of $\overline{\mathrm{TY}}.$ Prove that $\overline{\mathrm{IT}}\cong \stackrel{\text{\_\_\_}}{\mathrm{YD}}.$

Proof:

Statements	Reasons
1. $\overline{\mathrm{IT}}\parallel \stackrel{\text{\_\_\_}}{\mathrm{YD}}$ N is the midpoint of $\overline{\mathrm{TY}}.$	1. Given
2. $\angle T\cong \angle Y$	2.
3. $\overline{\mathrm{TN}}\cong \overline{\mathrm{NY}}$	3.
4.	4. Vertical Angles Theorem
5.	5. ASA Congruence Postulate
6. $\overline{\mathrm{IT}}\cong \stackrel{\text{\_\_\_}}{\mathrm{YD}}$	6.