Question

answer the following statement ​

Answer 1

Answer:

Q2. Area = 16 cm² ; Perimeter = 16cm

Q3. 5

Q4. 15

Step-by-step explanation:

Q2 :

• Area = (side)²

    => Area = 4² = 16 cm²

• Perimeter = 4 × side

    => Perimeter = 4(4) = 16cm

Q3 :

There are 5 vertices in a pentagon

We know that, 2 points of the 5 points are used to draw for diagonals

So, selecting 2 points out of 5 is ⁵C₂ = 10

But, there are already 5 lines made up of 2 lines {Those are sides of pentagon}. hence, we must eliminate them

So, 10 - 5 = 5 diagonals

Q3 :

Triangular number : The triangular number sequence is the representation of the numbers in the form of equilateral triangle arranged in a series or sequence. These numbers are in a sequence of 1, 3, 6, 10, 15, 21, 28, 36, 45, and so on. The numbers in the triangular pattern are represented by dots.

Hence, 5th number is 15

Example is in attachment below

Hope it helps

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