AB is a straight line.

Find the unknown marked angle.

Ans: ∠t = (a)   °

AB is a straight line.

Find the unknown marked angle.

Ans: ∠s = (a)   °

AB is a straight line.

Find the unknown marked angle.

Ans: ∠g = (a)   °

AB is a straight line.

Find the unknown marked angle.

Ans: ∠d = (a)   °

AB is a straight line.

Find the unknown marked angle.

Ans: ∠y = (a)   °

AB is a straight line.

Find the unknown marked angle.

Ans: ∠z = (a)   °

The lines meet at a point.

Find the unknown marked angle.

Ans: ∠f = (a)   °

The lines meet at a point.

Find the unknown marked angle.

Ans: ∠k = (a)   °

The lines meet at a point.

Find the unknown, marked angle.

Ans: ∠w = (a)   °

The lines meet at a point.

Find the unknown, marked angle.

Ans: ∠e = (a)   °

The lines meet at a point.

Find the unknown, marked angle.

Ans: ∠m = (a)   °

The lines meet at a point.

Find the unknown, marked angle.

Ans: ∠r = (a)   °

The lines meet at a point.

Find the unknown, marked angle.

Ans: ∠q = (a)   °

The lines meet at a point.

Find the unknown, marked angle.

Ans: ∠a = (a)   °

AB and CD are straight lines.

Find ∠n.

Ans: (a)   °

JK and LM are straight lines.

Find ∠NOK.

Ans: (a)   °

TU, PQ and RS are straight lines.

Find ∠POR.

Ans: (a)   °

AB, CD and EF are straight lines.

∠DOB is a right angle.

Find ∠FOD.

Ans: (a)   °

QR, ST, and UV are straight lines.

∠VOR is a right angle.

Find ∠e.

Ans: (a)   °

UV, WX, and YZ are straight lines.

Find ∠UOW.

Ans: (a)   °

GJ is a straight line.

∠LOK is a right angle.

Find ∠LOJ.

Ans: (a)   °

MN and XY are straight lines.

∠a = ∠b.

∠XOT is a right angle.

Find ∠c.

Ans: (a)   °

AC is a straight line.

∠ABE and ∠DBF are right angles.

Find ∠FBC.

Ans: (a)   °