Emily thought of a counting number, and then she added the next counting number to it. she got the sum of 57. what was emily’s number?

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.

The area of a circle is equal to 1 dm². find the radius of the circle.

When you find the area of a triangle do you use in. or in2