II. Exercises
Exercise 1:
A. DIRECTIONS: Complete the table below by filling up the blank.
Name of Polygon No. of Sides No. of Diagonals No. of triangles formed
from a
by the diagonals drawn
fixed vertex from a fixed point
Octagon
8
5
6
Sum of the interior
angles
1)
9
6
2)
1260°
Nonagon
Decagon
11-gon
10
3.)
8
1440°
8
9
16200
5)
12.
9
10
1800
3
Exercise 1:
A. DIRECTIONS: Complete the table below by filling up the blank.
Name of Polygon No. of Sides No. of Diagonals No. of triangles formed
from a
by the diagonals drawn
fixed vertex from a fixed point
Octagon
8
5
6
Sum of the interior
angles
1)
9
6
2)
1260°
Nonagon
Decagon
11-gon
10
3.)
8
1440°
8
9
16200
5)
12.
9
10
1800
3
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Answer:
name of polygon
12-gon
no of sides
11
the vertex
7
the fixed point is
7
angles
1150
Answer:
2)
1260°
Nonagon
Decagon
11-gon
10
3.)
8
1440°
8
9
16200
5)
12.
9
10
1800
3
Explanation:
2)
1260°
Nonagon
Decagon
11-gon
10
3.)
8
1440°
8
9
16200
5)
12.
9
10
1800
3