What is 20% reduced as a fraction ??

~~20/50 in simplest form is 2/5.

~~20/50 can be reduced to many smaller fractions. Dividing the numerators and denominators with the greatest common factor (GCF) will result into the simplest form of the fraction. Factors that are not GCFs will result the fraction into a fraction equivalent to the other. 

~Examples: 20/50 divided by 2 is 10/25. 20/50 divided by 5 is 4/10.

Read more on -

∠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.

the answer is 62.8 cubic units