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10.11.2020 •
Mathematics
Write an equation and solve :The sum of a number and 10 is equal to 12 divided by 6. Find the number
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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)