Question

Внутри отрезка АВ взяты точки N и D.AN=7см BD=9см АВ=10см.Чему равна длина DN? СРОЧНО

Answer 1

Ответ:

ответ

Пошаговое объяснение:

дадададададададдадалададададада

Answer 2

Ответ:

6

Пошаговое объяснение:

отрезок выглядит так

АДНБ где НБ = 3 а АД = 1(АД =АБ - ДБ, НБ = АБ - АН)

ДН = АБ - (АД + НБ)

Answer 3

Calculation of DN Length

To find the length of DN, we can use the concept of similar triangles. Given that AN = 7 cm, BD = 9 cm, and AB = 10 cm, we can calculate the length of DN using the following steps:

1. Calculate the length of AD: - Using the fact that AN + ND = AD, we can find the length of AD by subtracting AN from AB: - AD = AB - AN - AD = 10 cm - 7 cm - AD = 3 cm

2. Now, we can use the concept of similar triangles to find the length of DN: - Since triangles AND and BND are similar, we can set up the following proportion: - AN/BD = ND/DN - Substituting the given values: - 7/9 = 3/DN - Solving for DN: - DN = (9 * 3) / 7 - DN = 27 / 7 - DN ≈ 3.857 cm

Therefore, the length of DN is approximately 3.857 cm.