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morpeh [17]
3 years ago
9

Explain why you divide by 2 for triangles and why you divide by 3 for pyramids

Mathematics
1 answer:
Damm [24]3 years ago
8 0

Answer:

triangles are half a rectangle/square. So thats why you divide by 2. diving by 2 is also multiply by 1/2.

pyramids are in 3 dimensions, so since they are like half, but in three dimensions, you divide by 3, in other words multiply by 1/3.

Step-by-step explanation:

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A 100 rupee note was changed to 10 and 5 rupee notes, 15 notes in all. How many of each notes?​
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Answer:

Total number of notes is 11.

Step-by-step explanation:

Value is 100 rupees…

5x + 20y = 100 and x + y = 11 are the two equations.

We can simplify…

5x + 20 y - 5x - 5y = 100 - 55 = 45

15y = 45 so y = 3

x = 11 - y = 8

So, we have 8 notes of 5 rupees denomination and 3 notes of 20 rupees denomination.

I hope it helps you.

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A slice is made perpendicular to the base of a right rectangular prism as shown.
Eduardwww [97]

Answer:

The correct option is 1. The area of cross section area is 48 mm².

Step-by-step explanation:

From the find it is noticed that the cross section is a rectangle with length 4 mm and width is 12 mm.

The area of a rectangle is the product of its dimensions.

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