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Mathematics

1 answer:

I am Lyosha [343]3 years ago

7 0

Answer:

See explanation

Step-by-step explanation:

A parallelogram is a quadrilateral with parallel opposite sides. The main property of a parallelogram is that the opposite sides of the parallelogram are congruent.

1. Sides AB and CD are congruent, then

$4x=18\\ \\x=\dfrac{18}{4}=4.5$

2. Sides AD and BC are congruent, so

$\dfrac{1}{3}x=7\\ \\x=7\cdot 3=21$

3. Sides AD and BC are congruent, so

$x+4=15\\ \\x+4-4=15-4\\ \\x=11$

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