Q7. - Geometry

Question

In exercises $2-7$ find the measure of the arc.

 $\stackrel{⏜}{CDB}$

Step-by-Step Solution

Answer

a. The measure of an arc $\stackrel{⏜}{CDB}$ is $280.$

Step 1. Given information:

The given figure is,

Step 2. Concept used:

Following properties are used here,

 The arc length of a circle can be calculated with the radius and central angle.

Step 3. Applying the concept:

Here, in the figure

$\begin{array}{l}\angle CDB={360}^{\circ }-\angle BOC\\ {\text{ = 360}}^{\circ }-{80}^{\circ }\\ \text{ = 28}{0}^{\circ }\end{array}$       

       Since 

   $\begin{array}{l}m\stackrel{⏜}{CDB}=m\angle CDB\\ \text{ =280}\end{array}$      

Therefore, the measure of arc $CDB$ is $280.$