We say sin 0 = 0 is a good approximation if e and sin e differ by about 1% at most. Based on this information, for what range of angles is sin 0 = 0 a good approximation?

The perimeter of △cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.