• Exterior angles
•  Interior angles
• Interior opposite angles
• Interior opposite angles

If the angles of a triangle are in the ratio 5 : 3 : 7, then the triangle is:

• an acute angled triangle
• an obtuse angled triangle
•  a right triangle
•  a right triangle

From the given figure, identify the incorrect statement, given that l || m and t is the transversal:

• ∠2 and ∠5 are supplementary
• ∠2 and ∠8 are supplementary
• ∠2 and ∠3 are supplementary
• ∠2 and ∠3 are supplementary

In figure, the value of angle q is:

• 60° 
• 90°
• 50°
• 50°

In the figure, if ∠A + ∠B + ∠C + ∠D + ∠E + ∠F = k right angles, then k is:

• 2
• 3
• 4
• 4

197. Let OA, OB, OC and OD be the rays in the anticlockwise direction starting from OA, such that ∠AOB = ∠COD = 100°, ∠AOD = ∠BOC = 80°. Is it true that AOC and BOD are straight lines? Justify your answer by drawing the figure.