Trên giá sách có 10 quyển sách Tiếng Việt khác nhau, 8 quyển tiếng Anh khác nhau và 6 quyển tiếng Pháp khác nhau. Hỏi có bao nhiêu cách chọn a) Một quyển scahs?
b) Ba quyển sách tiếng khác nhau?
c) Hai quyển sách tiếng khác nhau?

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

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step-by-step explanation:

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