In Exercises 13 to 16, provide the missing reasons.
Given:
Prove:
PROOF  
Statements  Reasons 
1.

1. ? 
2.

2. ? 
3.

3. ? 
4.

4. ? 
5.

5.? 
6.

6. ? 
To provide:
The missing reasons.
Given:
Given:
Prove:
PROOF  
Statements  Reasons 
1. 
1. ? 
2. 
2. ? 
3. 
3. ? 
4. 
4. ? 
5. 
5.? 
6. 
6. ? 
Definition:
If the three sides of one triangle are proportional (in length) to the three corresponding sides of a second triangle, then the triangle are similar.
Description:
Given that
To Prove:
From the given figure, it is observed that the line segment MN joining the two sides of AB and AC. In the triangle ABC, M is the midpoint of AB and N is the midpoint of AC.
By the definition of midpoint,
It is known that the line segment MN joins the midpoints of two sides a triangle, its length MN is half the length of BC
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