Question 13 of 16intermediate🔧 ApplyShort Answer2 marks

How many edges do you see? (Icosahedron and Dodecahedron)

Correct Answer

Icosahedron (20 triangular faces): 30 edges

Dodecahedron (12 pentagonal faces): 30 edges

Conclusion: Both solids have the same number of edges.

Exercise: Icosahedron and Dodecahedron | Q: 43 | (Page Page 12)
For More Understanding

Explanation

The chapter encourages students to count edges systematically. An icosahedron (20 triangular faces) has 30 edges, and a dodecahedron (12 pentagonal faces) also has 30 edges. Students should develop counting strategies to avoid missing or double-counting edges.

Solution Steps

  1. An icosahedron has 20 triangular faces and 30 edges.

  2. A dodecahedron has 12 pentagonal faces and 30 edges.

  3. Both solids have the same number of edges.

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