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22/24 Marks 51% The diagram shows a star made by surrounding a regular octagon with triangles. Explain why angle a must be 135º. + I
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4 votes
4 votes
22/24 Marks

51%
The diagram shows a star made by surrounding a
regular octagon with triangles.
Explain why angle a must be 135º.
+
I

22/24 Marks 51% The diagram shows a star made by surrounding a regular octagon with-example-1
User Silviot
by
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1 Answer

7 votes
7 votes

Answer:

Explanation:

shape Sides Sum of interior angles Each Angle

Triangle 3 180° 60°

Quadrilateral 4 360° 90°

Pentagon 5 540° 108°

Hexagon 6 720° 120°

Heptagon 7 900° 128.57...°

Octagon 8 1080° 135°

Nonagon 9 1260° 140°

User Ephemient
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