Question

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Answer 1

Answer:

[a] The data collected by the user himself is known as primary data.

[b] It is the difference between the largest and smallest values.      =17

[a] A triangle is a type of polygon, which has three sides.

[b]An acute angle is any angle smaller than 90 degrees.         = 18

Step-by-step explanation:

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Answer 2

Answer:

17. define (b) Range - the limits between which something can vary.

18. Explain the following terms

(b) Acute angle - an angle of less than 90°.

Step-by-step explanation:

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