Kích thước chi tiết là biến ngẫu nhiên phân phối chuẩn với u=50cm. Kích thước thực tế của các chi tiết không nhỏ hơn 32cm và không lớn hơn 68 cm. Tìm xác suất để lấy ngẫu nhiên mọt chi tiết có kích thước: a) Lớn hơn 55cm b) Nhỏ hơn 40 cm

∠1≅∠2 by the alternate exterior angles theorem.

step-by-step explanation:

given, a ∥ b and ∠1 ≅ ∠3 .we have to prove that e ∥ f

we know that ∠1≅∠3 and that a || b because they are given. we see that by the alternate exterior angles theorem. therefore, ∠2≅∠3 by the transitive property. so, we can conclude that e || f by the converse alternate exterior angles theorem.

we have to fill the missing statement.

transitivity property states that if a = b and b = c, then a = c.

now, given ∠1≅∠3 and by transitivity property ∠2≅∠3 .

hence, to apply transitivity property one angle must be common which is not in result after applying this property which is ∠1.

the only options in which ∠1 is present are ∠1 and ∠2, ∠1 and ∠4

∠1 and ∠4 is not possible ∵ after applying transitivity we didn't get ∠4.

hence, the missing statement is ∠1≅∠2.

so, ∠1≅∠2 by the alternate exterior angles theorem.

a

step-by-step explanation:

u take $30 minus $24. the answer/original($30)

step-by-step explanation: