\triangle ABC\sim \triangle DEF If AB=6 and AC=8, which statement will justify similarity by SAS?

ddaeeric 2021-07-30 Answered
In the diagram, ABCDEF.

If AB=6 and AC=8, which statement will justify similarity by SAS?
1) DE=9, DF=12, and A=D
2) DE=8, DF=10, and A=D
3) DE=36, DF=64, and C=F
4) DE=15, DF=20, and C=F
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Expert Answer

Adnaan Franks
Answered 2021-07-31 Author has 92 answers
Step 1
Given Data:
The length of side AB is: AB=6
The length of side AC is: AC=8
According to SAS, two pairs of corresponding sides of both triangles should be in the same proportion, and the angle made by these two adjacent lines of each triangle is congruent then they call similar triangle by SAS similarity.
From SAS similarity rule,
Condition 1: ABDE=ACDF
Condition 2: A=D
Step 2
For option (1), DE=9, DF=12, A=D
Substitute all the values in condition 1,
69=812
0.67=0.67
Option (1) satisfies condition 2 too.
So, option (1) satisfies each condition.
For option (2), DE=8, DF=10, A=D
Substitute all the values in condition 1,
68=810
0.75q0.8
So, option (2) satisfies only condition 2.
Step 3
For option (3), DE=36, DF=64, C=F
Substitute all the values in condition 1,
636=864
0.17q0.125
Option (3) does not satisfy condition 2.
For option (4), DE=15, DF=20, C=F
Substitute all the values in condition 1,
615=820
0.4=0.4
Option (4) does not satisfy condition 2.
Thus, option (1) is the correct option.
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