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Novosadov [1.4K]
3 years ago
5

What is the measure of angle A in the triangle? Enter your answer in the box. mZA=

Mathematics
2 answers:
Lilit [14]3 years ago
7 0

Answer:

mZA=50

Step-by-step explanation:

There is a total of 180 degrees in a triangle.

2x-10+70+x+30=180

3x+90=180

3x=90

x=30

Plug in 30 to the measure of angle A

2(30)-10

60-10

50

stepladder [879]3 years ago
6 0

Answer:

50

Step-by-step explanation:

The sum of the angles of a triangle add to 180 degrees

A + B + C = 180

2x-10 + 70+ x+30 = 180

Combine like terms

3x +90 = 180

Subtract 90 from each side

3x+90-90=180-90

3x= 90

Divide by 3

3x/3= 90/3

x=30

We want to find angle A

A = 2x-10

   =2*30 -10

  =60-10

  50

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