View HintsWhat do you know about opposite angles of a parallelogram? Firstly count all the sides of a polygon and then use the formula to find the measure of each exterior angle. Use formula of the sum of interior angles. A decagon has 10 sides. Sum of interior angle is \\((n-2)\\times180\\) Exterior angle of an n-sided polygon = \\(\\left ( \\frac{360}{n} \\right )^{0}\\); where n = 5 Use properties of convex and concave polygons. What is the sum of three angles of a triangle? Use the exterior angle formula of a polygon. For a regular n-sided polygon: Each interior angle = \\(180^{o}-\\left ( \\frac{360^{o}}{n} \\right )\\) it can be calculated by the formula- each exterior angle of a regular polygon = \\(180^0 - {(n-2)180^0 \\over n}\\) |
