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schepotkina [342]
3 years ago
6

PLEASEEEE HELPPP

Mathematics
1 answer:
iVinArrow [24]3 years ago
3 0

The value of x is 13°.

Solution:

<em>In triangle, sum of all the interior angles = 180°</em>

m∠A + m∠B + m∠C = 180°

(3x)° + (4x – 1)° + 90° = 180°

3x° + 4x° – 1° + 90° = 180°

7x° + 89° = 180°

Subtract 89° from both sides of the equation, we get

7x° = 91°

Divide by 7 from both sides of the equation, we get

x° = 13°

The value of x is 13°.

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