Polygons, equal figures, area, are and hectare
Name a polygon by its vertices, find an equal figure by laying it on another, learn how equal figures differ from figures with equal area, and convert a field's area to hectares. Section: Grade 5, equal figures, area, are and hectare; the formula S = a · b is in the Grade 4 studio.
- أوكرانيا: الصف ٥
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الدليل
This follows the Ukrainian Year 5 book: item 13 "Polygons. Equal figures" (section 2) and item 21 "Area. The area of a rectangle" (section 3). The child chooses an answer, taps a figure or types a number.
A polygon is named by its vertices in order, starting from any one: ABCD, BCDA, DCBA. Two figures are equal if they coincide when laid on each other. Equal figures have equal areas, but figures with equal areas need not be equal.
For land, the book uses the are (1 a = 100 m²) and the hectare (1 ha = 10 000 m²). In everyday speech an are is called a "sotka".