Q2. 3 pd
Here are four number cards.
One of the cards is turned over so you cannot see the number on it.
4
6
7.
The mean of the four numbers is 6
Work out the number you cannot see.
Your answer

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.