the use of matches to build patterns
we have to find matching pattern by this rule:
an = dn - c
The an stands for the nth term of the pattern. So a1 is the first term and a2 is the second term of the pattern. The d is the difference between each of the terms. The n stands for the term you're calculating. If you're calculating the third term, then n is 3. And c is a constant that you'll need to calculate.
concept of concreate:
concrete is defined as the minimum strength the concrete must posses after 28 days of construction with proper quality control. Grade of concrete is denoted by prefixing M to the desired strength in MPa
concept of semi-concrete:
The math concept/skill is next modeled at the representational (semi-concrete) level, which involves drawing pictures that represent the concrete objects previously used
concept of semi-abstract:
pertaining to or designating a style of painting or sculpture in which the subject remains recognizable although the forms are highly stylized in a manner derived from abstract art
these terms concrete,semi-concrete,and semi-abstract are helping to matching in build patterns.