Ana has a poster board in the shape of a rectangle. she draws 1 line to cut the poster into 2 new shapes. The 2 new shapes have
7 side and 7 vertices in all
1 answer:
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Answer:
D
Step-by-step explanation:
using the definition of n =
where n! = n(n- 1)(n - 2)......× 3 × 2 × 1
here n = 7 and r = 4, hence
7
=
= ← cancel 3 × 2 × 1 leaving
7 = 7 × 6 × 5 × 4 = 840 → D