Answer :
Answer:
71 sides
Step-by-step explanation:
3 decagons = 3 × 10 = 30 sides since 1 decagon has 10 sides.
2 pentagons = 2 × 5 = 10 sides since 1 Pentagon has 5 sides.
4 quadrilaterals = 4 × 4 = 16 sides since 1 Quadrilateral has 4 sides.
5 triangles = 5 × 3 = 15 sides since 1 triangle has 3 sides
Therefore, in all they have:
= 30 + 10 + 16 + 15
= 71 sides
