Verified answer

Answer:

2) X + 7 + x + 20 + x + 13 = 180

3x + 40 = 180

3x = 180 - 40

X = 140/3

3) POS = 70 ( ASP)

c = 180 - POS ( linear pair)

c = 110

QOB = POS ( VOA)

B = 180 - 50 - QOB ( ASP)

B = 180 - 120

B = 40

OBR = 50 + 70 ( EAP}

OBR = 120

20 + 120 + A = 180

A = 40

4) a) x = 43 ( Coresponding angles)

Angle 1 = 43 ( VOA)

y + 43 = 180 ( Co interior angle)

Y = 180 - 43

= 137

b) COD = 180 - 68 +71 ( ASP)

= 41

COD = AOB ( VOA)

x = 180 - 100 + 41 ( ASP)

= 39

Asp = angle sum property

Voa = vertically opposite angle

EaP = exterior angle property