What is the value of ?
86°
84°
?
360
Helpppo !

All angles in a triangle measures 180 degrees

Add all the angles in triangle 2

84 + 36 = 120

The angle that is divided between triangle 1 and 2 measures 90 degrees so we are gonna add it to the total of triangle 2

120 + 90 = 210

Because no angles in a triangle measures 210 we are gonna subtract 180 from .

210 - 180 = 30

The missing angle in the second triangle is;

180 - 120 = 60 degrees

The total we got after subtracting 180 from 210 is the missing angle for the divided side of triangle 1.

Now that we have 2 angles we can now find “?”

To find “?” we are gonna add the two angles we have and subtract it from 180.

86 + 30 = 116

180 - 116 = 64

Therefore “?” is equal to 64 degrees.

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