
You are watching: Prove that a rectangle has congruent diagonals
Let"s view why we can insurance claim that the diagonals are congruent. Right here is a sample proof:

AD ≅ BC | an interpretation of Rectangle |
DC ≅ DC | Reflexive property |
congruent and right angles | meaning of Rectangle |
ΔBCD ≅ ΔADC | Side, Angle, side |
AC ≅ BD | CPCTC |

Step 1: Plot the clues to obtain a intuitive idea of what you are working with.
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In this example, us will show that both pairs of the contrary sides are parallel. To perform this we have to calculate the steep of each side. If us can present that the slopes of opposing sides space the same, then the the contrary sides room parallel.Recall that the slope can be determined using m =






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