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Scilla [17]
3 years ago
8

Parallelograms in geometry.

Mathematics
2 answers:
k0ka [10]3 years ago
8 0

Answer:

x = 16

Step-by-step explanation:

In a parallelogram , consecutive angles sum to 180° , then

3x + 5 + 9x - 17 = 180

12x - 12 = 180 ( add 12 to both sides )

12x = 192 ( divide both sides by 12 )

x = 16

LekaFEV [45]3 years ago
7 0

take off the parentheses and then take off the number and the degrees symbol with the plus sign

take off the parentheses from the 9,-,17, and the degrees symbol

now your left with 2 x'

do x-x = what?

it it x

period

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