What is the value of the shaded angle in shape A?. Please find attachemet to get shade.
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What is the value of the shaded angle in shape A?. Please find attachemet to get shade.
Angles in a circle add up to $\displaystyle 360^{\circ}$.
For B:
All angles at a point add to 360. Assuming all sides are equal, B is divided into 4 equal parts.
$\displaystyle \frac{360^{\circ}}{4} = 90^{\circ}$
The rest of them are similar.