ABCD is a rectangle, A is (1,3) and D is (5,5).Ac lies on the line 3y=4×+5 Find the equation of DC ,The coordinates of C, the coordinates of B and The area of ABCD

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc