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Chapter 1: Q17 (page 20)

State the measure of each angle.

  • 鈭�BOC

Short Answer

Expert verified

The measure of鈭�BOC is 70掳.

Step by step solution

01

Step 1. Apply protractor postulate

Consider rays, OA炉and OH炉 which are drawn from point O on OH炉.

These rays鈥� results in pairing with the angles from 0 to 180 in such a way that:

The line OA炉is paired with 0, andOH炉 with 180.

If OB炉 is paired with x, and OA炉with y, then m鈭�BOC=x鈭�y.

02

Step 2. Observe the figure below and write the values of OB and OC.

It can be observed from the figure that, OB炉is OC炉and is 90.

03

Step 3. Calculate m鈭燘OC

m鈭�BOC=20鈭�90=鈭�70=70掳

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