What is the value of the shaded angle in shape A?. Please find attachemet to get shade.

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- Aug 12th 2010, 11:04 PMalanpaulTo find the value angleWhat is the value of the shaded angle in shape A?. Please find attachemet to get shade.
- Aug 12th 2010, 11:10 PMProve It
Angles in a circle add up to $\displaystyle 360^{\circ}$.

- Aug 13th 2010, 12:44 AMDavidM
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.