emileep13
17.12.2020 •
Mathematics
Which of the following could be the numbers of left-handed and right-handed students at West Junior
High?
Choose 2 answers:
Left-handed: 42
Right-handed: 483
Left-handed: 28
Right-handed: 378
с
Left-handed: 48
Right-handed: 504
Left-handed: 56
Right-handed: 560
Left-handed: 30
Right-handed: 315
Solved
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Ответ:
Step-by-step explanation:
Use triangle congruency:
BC=EC, AC=DC - Given
m∠DCE = m∠ACB because they are vertical angles
Therefore ΔABC ≅ ΔDEC because of Side-Angle-Side congruency
AB=DE because corresponding parts of congruent triangles are also congruent (CPCTC)