Question

Дан острый угол АОС. Точка D лежит между точками О и А, точка В между точками О и С. Известно что ОА=ОС и угол ОАВ равен ОСD . докажите что треугольники АОВ и ОСD равны. Найдите сторону АВ если сторона DС=15 см. Можно просто рисунок без решения.​

Answer 1

Ответ:

Объяснение:Дан острый угол АОС.

Answer 2

To prove that triangles AOV and OCD are congruent, we can use the Side-Angle-Side (SAS) congruence criterion. According to the given information, OA = OC, angle OAB = angle OCD, and we need to prove that triangle AOV is congruent to triangle OCD.

Proof:

1. Given: OA = OC, angle OAB = angle OCD, and angle OAV = angle OCD. 2. Since OA = OC, we have side OA congruent to side OC. 3. Angle OAB = angle OCD (given). 4. Angle OAV = angle OCD (given). 5. By SAS congruence criterion, triangles AOV and OCD are congruent.

Therefore, triangles AOV and OCD are congruent.

To find the length of side AB, we need more information. The length of side DC is given as 15 cm, but we don't have any information about the relationship between side AB and side DC. Without additional information, we cannot determine the length of side AB.

Please let me know if there is anything else I can help you with!