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12-03-2020
Mathematics

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The measure of angle RST Can be represented by the expression (6x+12%).

The measure of angle RST Can be represented by the expression 6x12 class=

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12-03-2020

Because two known adjacent angles make up <RST... we can say that...

78+3x-12=6x+12

66+3x=6x+12

54=3x

x=18

6x+12=120°

answer: 120°

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