Explanation:
1. If Group ={ Polygon }
Subgroup ={ Triangle, Quadrilateral, Pentagon, Hexagon,Heptagon,Octagon,Nonagon, Decagon}
2. If, Group = {Triangle}
Subgroup={Isosceles Triangle, Equilateral Triangle, Scalene Triangle}
3. Group={Quadrilateral}
Subgroup={Parallelogram, Rhombus, Square, Rectangle,Kite}
Picture is depicted below.
Answer:
The answer would be 331.
B.99°
Step-by-step explanation:
105°+ 66°+90°+ angle c=360°
angle c= 360° - 261
=99°