Q4 of 32 Page 67

In Figure 5.62 reflex angle ∠AOB is equal to-

Now it is given that ∠ AOB is 60°. So total angle around a point is 360°.

So the reflex angle can be calculated as = 360° - 60°

= 300°

A reflex angle is an angle greater than 180° and less than 360°.

So the correct answer is C.

In Figure 5.60 POQ is straight line. The value of x is-

In Figure 5.61 OP || RS, ∠OPQ = 110° and ∠QRS = 130° then PQR is equal to-

In Figure 5.63 two straight lines AB and CD are intersecting each other at point O and the angle thus formed at O are marked.

Here the value of ∠x – ∠y is –

From Figure 5.64 state which of the following pairs of angles are not corresponding angles:

Questions · 32

5. Plane Geometry and Line and Angle

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