I will give brainliest! How many meters are there in 21 feet?

Note:
In the metric system of units: 1 meter = 100 centimeters and 1 meter: 1 foot = 3.25:1

I need the step-by-step explanation please. I will give brainliest if you give a good explanation.

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.