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Q1.
Expert-verifiedCopy and complete the proof.
1. Given: is the midpoint of . Prove: is the midpoint of
Proof
Statement | Reason |
1. | Given |
2. is the midpoint of | Given |
3. | As is the midpoint of and midpoint is a point on a line segment that divides it into two congruent line segments |
4. | Vertically Opposite angles |
5. | ASA congruence criteria |
6. | Corresponding parts of congruent triangles are equal |
7. is the midpoint of | As and midpoint is a point on a line segment that divides it into two congruent line segments |
Since, first and second statement of two column proof are given in the question. So, there reason must be “Given”.
Since, midpoint is a point on a line segment that divides it into two congruent line segments
Thus, divides line segment in two congruent line segments
Hence, reason of third statement must be
“As is the midpoint of and midpoint is a point on a line segment that divides it into two congruent line segments”
Observe from figure, and are vertically opposite angles and such angles are congruent
So reason for will be “Vertically opposite angles”
According to ASA congruence criteria, two triangles are said to be congruent if two angles and the included side of one triangle are congruent to the two angles and the included side of another triangle
Using statement 1, 3, and 4
So its reason will be “ASA Congruence Criteria”
Since, corresponding parts of congruent triangles are equal
So, because of same reason
As and midpoint is a point on a line segment that divides it into two congruent line segments
Thus, it the reason for the statement “ is the midpoint of ”
Hence, complete proof will be
Statement | Reason |
1. | Given |
2. is the midpoint of | Given |
3. | As is the midpoint of and midpoint is a point on a line segment that divides it into two congruent line segments |
4. | Vertically Opposite angles |
5. | ASA congruence criteria |
6. | Corresponding parts of congruent triangles are equal |
7. is the midpoint of | As and midpoint is a point on a line segment that divides it into two congruent line segments |
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