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  • 22-05-2018
  • Mathematics
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please find the angle measure for angle a and b

please find the angle measure for angle a and b class=

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musiclover10045
musiclover10045 musiclover10045
  • 22-05-2018
The 3 inside angles of a triangle need to equal 180
 
Now we can add all 3 angles and solve for x:

2x +x +60 = 180

Add 2x and x to get 3x

We now have 3x +60 = 180

Subtract 60 from each side:

3x = 120

Divide both sides by 3 to get x

x = 120/3
x = 40

Since angle b = x, angle b = 40 degrees

Angle a = 2x , so angle a =  2 *40 = 80 degrees

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