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Topic Content:
- Angles in Quadrilaterals
Below is a diagram of a quadrilateral
Two triangles can be formed within the quadrilateral ABCD
Sum of angles in each triangle = 180°
Sum of angles in a quadrilateral = 2 × 180°
Sum of interior angles in a quadrilateral = 360°
Examples 10.3.1:
Calculate the angle marked x in the quadrilateral below.
Solution
x + 80° + 108° + 140° =
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