This jewelry box has the shape of a regular pentagon. it is packaged in a rectangular box as shown here. the box uses two pairs of congruent right triangles made of foam to fill its four corners. find the measure of the foam angle marked.

Rai compares two cable plans from different companies. which equation gives the correct value of mm, the number of months for which plans a and b cost the same?

If a || b and e || f , what if the value of y ?

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.