Calculate and compare the area of rectangles (including squares), including using standard units, square centimetres (cm²) and square metres (m²), and estimate the area of irregular shapes

What this means, in plain words

Area is the amount of surface a flat shape covers, counted in squares.

Estimating means reaching an answer close enough to be useful, before or instead of calculating it exactly.

An angle measures an amount of turn, in degrees, with a full turn being 360.