Question

Two yellow, house-shaped traffic signs showing a parent and child, with different inner lines in each.
Select the correct decomposition into triangles of the sign shaped as a pentagon.

Choose 1 for Figure A, 2 for Figure B, or 3 for both Figure A and Figure B.

(1 point)

Answer 1

2

Figure B is the correct triangulation. A proper triangulation of a pentagon uses exactly 2 non‑crossing diagonals (giving 3 triangles). Figure A’s inner lines either cross or do not run between vertices, so it does not decompose the pentagon into triangles.