3 years ago

Find measure of angle A

Mathematics

2 answers:

Pachacha [2.7K]3 years ago

8 0

Answer:

116°

Step-by-step explanation:

3x-4+9x+17+6x-31=180

18x-18=180

+18 +18

18x=198

18x/18=198/18

x=11

a=9x+17

a=9(11)+17

a=99+17

a=116°

hopefully this helps :)

kipiarov [429]3 years ago

8 0

Angle A : 116°

<h3>Further explanation</h3>

The sum of all the angles in the triangle is 180°

∠A+∠B+∠C=180°

$\tt 9x+17+3x-4+6x-31=180\\\\18x-18=180\\\\18x=198\\\\x=11\\\\A=9.11+17=116^0$

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