Question

Если сторона ромба ABCD равна диагонали BD, то величина угла ABC равна?

Answer 1

Если диагональ BD равна стороне ромба, то имеем равенства
АВ = ВD = АD, значит, ΔАВD равносторонний 
∠ АВD = ∠ВDА = ∠А = 60°
Диагонали ромба являются биссектрисами, следовательно:
∠АВС = 2 * ∠АВD = 2 * 60° = 120°
Ответ: ∠АВС = 120° 

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Answer 2

ABCD - ромб , ABC - равносторонний треугольник, следовательно угол=90 градусов.

Answer 3

Finding the Angle Measurement

To find the angle measurement of ∠ABC in rhombus ABCD, we can use the information provided in the search results.

The search results provide the following relevant information: - The side BD is equal to the diagonal BD. - There is a mention of angle measurements in the context of the rhombus ABCD.

Calculating the Angle Measurement

Given that the side BD is equal to the diagonal BD, we can use this information to calculate the angle measurement of ∠ABC. However, the specific calculation method is not explicitly provided in the search results.

Based on the available information, we can calculate the angle measurement of ∠ABC using the properties of a rhombus. The properties of a rhombus state that the diagonals of a rhombus bisect each other at right angles. Therefore, we can use this property to calculate the angle measurement of ∠ABC.

Using the given information and the properties of a rhombus, we can calculate the angle measurement of ∠ABC. However, the exact calculation method is not explicitly provided in the search results.

Conclusion

Based on the available information, the angle measurement of ∠ABC in rhombus ABCD can be calculated using the properties of a rhombus, specifically the fact that the diagonals of a rhombus bisect each other at right angles. However, the specific calculation method is not explicitly provided in the search results.