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Nikolay [14]
3 years ago
7

I will mark brainlest please help!!!!

Mathematics
1 answer:
trasher [3.6K]3 years ago
4 0

Answer:

m∠T = 45°

Step-by-step explanation:

The sum of angles in a triangle is 180°.

∠S + ∠T + ∠U = 180°

2x + 10 + 3x - 9 + 6x - 19 = 180

11x - 18 = 180

11x = 180 + 18

    = 198

x = 198 ÷ 11

x = 18

m∠T = 3x - 9

        = 3(18) - 9

        = 54 - 9

m∠T = 45°

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Step-by-step explanation:

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