The sum of the sizes of the angles at a point is 360°.
Find the unknown of the following :
Problem 1 :
Solution :
2x - 10 + 28 + x + x + 30 = 360
4x - 10 + 28 + 30 = 360
4x + 48 = 360
Subtracting 48 on both sides.
4x = 360 - 48
4x = 312
Dividing by 4 on both sides.
x = 312 / 4
x = 78
Problem 2 :
Solution :
b + 311 = 360
Subtracting 311 on both sides.
b = 360 - 311
b = 49
Problem 3 :
Solution :
29 + x = 360
Subtracting 29 on both sides.
x = 360 - 29
x = 331
Problem 4 :
Solution :
m + 92 + 42 = 360
m + 134 = 360
Subtracting 134 on both sides.
m = 360 - 134
m = 226
Problem 5 :
Solution :
60 + 160 + n = 360
220 + n = 360
Subtracting 220 on both sides.
n = 360 - 220
n = 140
Problem 6 :
Solution :
d + 90 + 140 = 360
d + 230 = 360
Subtracting 230 on both sides.
d = 360 - 230
d = 130
Problem 7 :
Solution :
2g + 3g + 90 = 360
5g + 90 = 360
Subtracting 90 on both sides.
5g = 360 - 90
5g = 250
Dividing by 5 on both sides.
g = 250/5
g = 50
Problem 8 :
Solution :
3x + 3x + 30 + x - 31 + 67 = 360
7x + 30 + 67 - 31 = 360
7x + 97 - 31 = 360
7x + 66 = 360
Subtracting 66 on both sides.
7x = 360 - 66
7x = 294
Dividing by 7 on both sides.
x = 294/7
x = 42
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM