Drag and drop the correct answer into each box to complete the proof. given: rectangle abcd prove: ac¯¯¯¯¯≅bd¯¯¯¯¯

  Statement                                    Reason

1. Rectangle ABCD                         Given

2. AD=BC                                        Opposite sides of a rectangle are congruent

3. DC=DC                                        Reflexive Property of Congruence

4. <ADC and <BCD are                  Definition of rectangle

   right angles

5.  <ADC=<BCD                              All right angles are congruent

6. ∆ADC=∆BCD                              SAS Congruence Postulate

7. AC=BD                                        CPCTC  

Step-by-step explanation:

2. AD=BC because the opposite sides of a rectangle are congruent.

3. DC=DC, each segment is equal to itself because the Reflexive Property of Congruence.

4. <ADC and <BCD are right angles because the interior angle of any rectangle are right angles (Definition of rectangle).

5. <ADC=<BCD, because they are right angles and all right angles are congruent.

6. ∆ADC is congruent with ∆BCD because the have two congruent sides (AD with BC and DC with DC), and congruent the angle between these sides (<ADC with <BCD): Side Angle Side Congruence Postulate (SAS Congruence Postulate).

7. AC must be congruent with BD because Congruent Parts in Congruent Triangles must be Congruent (CPCTC).

answer: asdfghjkl,mnbv

step-by-step explanation:

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.