Greek Gymnasium Grade 1 / Mathematics / Μέρος Β: Γεωμετρία
Βασικές γεωμετρικές έννοιες: structured theory, worked examples, answered practice, and a mastery checklist for Greek Gymnasium Grade 1.
CHAPTER PLAN
Follow the steps in order or jump directly to the part you need.
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Estimated active study time
140 minutes
Objectives, key ideas, and structured theory.
Open →Worked examples that explain every step.
Open →Graded tasks with hints and answer guidance.
Open →Assignments from core work to challenge.
Open →A timed, marked test with solution guidance.
Open →Progress is stored only in this browser and does not require AI credits.
Unit
The essential chapter ideas in a clear sequence before practice.
Mark every given on the diagram and state the target clearly. Start from a relationship that connects exactly those quantities.
Every geometric step needs a property, theorem, or definition. A result without justification is not a complete proof.
Length, area, volume, and angle use different units. Round only at the end and keep sufficient intermediate precision.
Draw and label every given before choosing a property or formula. Finish with estimation, an inverse operation, or substitution as a check.
Draw and label every given before choosing a property or formula. Finish with estimation, an inverse operation, or substitution as a check.
Draw and label every given before choosing a property or formula. Finish with estimation, an inverse operation, or substitution as a check.
Draw and label every given before choosing a property or formula. Finish with estimation, an inverse operation, or substitution as a check.
Draw and label every given before choosing a property or formula. Finish with estimation, an inverse operation, or substitution as a check.
Mathematics
Follow the method step by step and check why every step is valid.
A rectangle is 12 cm long and 6 cm wide. Find its perimeter and, where covered, its area.
Perimeter 36 cm, area 72 cm².
Explain “Σημείο, ευθύγραμμο τμήμα, ευθεία, ημιευθεία” in your own words and use a picture, objects, a table, or a simple measurement to support it.
A complete explanation connects the correct idea, a clear representation, and a sensible check.
Βασικές γεωμετρικές έννοιες
Eight graded tasks from core fluency to exam-style application. Work independently before opening a hint or answer.
Calculate 9 + 6 and show two representations connected with “Σημείο, ευθύγραμμο τμήμα, ευθεία, ημιευθεία”.
Use a number line, place value, or objects.
9 + 6 = 15. Valid representations include number-line jumps and grouped objects.
3 equal groups contain 5 objects each. Find the total and write an addition and multiplication statement.
Add 5 a total of 3 times.
5 + 5 + 5 = 3 · 5 = 15.
Continue 8, 13, 18, ... for three more terms and explain the rule.
Check how much each term increases.
23, 28, 33; +5.
A rectangle has sides 4 cm and 2 cm. Find its perimeter and explain why four sides are counted.
Opposite sides are equal.
Perimeter = 4 + 2 + 4 + 2 = 12 cm.
Out of 28 objects, 7 are shaded. What fraction is shaded and how does it simplify?
Put shaded objects over the total.
7/28 = 1/4.
The measurements are 3, 6, 3, and 6. Find the greatest, least, and range.
Range = greatest value minus least value.
Greatest 6, least 3, range 3.
Anna has 18 cards, gives away 6, then shares the rest into 2 equal groups. How many are in each group?
Subtract first, then divide.
18 - 6 = 12; (12) : 2 = 6.
A learner says 9 + 5 = 15. Find the error, correct it, and check the correction.
Check with a number line or inverse subtraction.
9 + 5 = 14; 14 - 5 = 9.
Βασικές γεωμετρικές έννοιες
Six distinct assignments from core fluency to challenge, each with an estimated time, hint, and answer guide.
Homework 1: Calculate 5 + 2 and show two representations connected with “Σημείο, ευθύγραμμο τμήμα, ευθεία, ημιευθεία”.
Use a number line, place value, or objects.
5 + 2 = 7. Valid representations include number-line jumps and grouped objects.
Homework 2: 4 equal groups contain 8 objects each. Find the total and write an addition and multiplication statement.
Add 8 a total of 4 times.
8 + 8 + 8 + 8 = 4 · 8 = 32.
Homework 3: Continue 4, 10, 16, ... for three more terms and explain the rule.
Check how much each term increases.
22, 28, 34; +6.
Homework 4: A rectangle has sides 7 cm and 3 cm. Find its perimeter and explain why four sides are counted.
Opposite sides are equal.
Perimeter = 7 + 3 + 7 + 3 = 20 cm.
Homework 5: Out of 15 objects, 3 are shaded. What fraction is shaded and how does it simplify?
Put shaded objects over the total.
3/15 = 1/5.
Homework 6: The measurements are 6, 2, 6, and 2. Find the greatest, least, and range.
Range = greatest value minus least value.
Greatest 6, least 2, range 4.
35 minutes / 30 marks
A timed, full-mark self-assessment with model-answer guidance.
Start the timer when ready, work without notes, show every step, and open model answers only after finishing.
1. Calculate 3 + 2 and show two representations connected with “Σημείο, ευθύγραμμο τμήμα, ευθεία, ημιευθεία”.
2 marks3 + 2 = 5. Valid representations include number-line jumps and grouped objects.
2. 4 equal groups contain 6 objects each. Find the total and write an addition and multiplication statement.
3 marks6 + 6 + 6 + 6 = 4 · 6 = 24.
3. Continue 9, 15, 21, ... for three more terms and explain the rule.
3 marks27, 33, 39; +6.
4. A rectangle has sides 5 cm and 3 cm. Find its perimeter and explain why four sides are counted.
4 marksPerimeter = 5 + 3 + 5 + 3 = 16 cm.
5. Out of 40 objects, 8 are shaded. What fraction is shaded and how does it simplify?
4 marks8/40 = 1/5.
6. The measurements are 4, 2, 4, and 2. Find the greatest, least, and range.
4 marksGreatest 4, least 2, range 2.
7. Anna has 28 cards, gives away 7, then shares the rest into 3 equal groups. How many are in each group?
5 marks28 - 7 = 21; (21) : 3 = 7.
8. A learner says 3 + 6 = 10. Find the error, correct it, and check the correction.
5 marks3 + 6 = 9; 9 - 6 = 3.
Unit
Curriculum reference sources. Always confirm the teaching sequence with the school and tutor.
Mathematics
Build foundations: accurate operations, fractions, percentages, ratios, basic shapes, and readable written solutions.
The structure follows the official textbook layout and is used to organise study.
The areas that usually create mistakes or need extra revision.
Where to start: textbook, daily material, PDFs, videos, and worked examples.
Targeted practice before full tests so coverage is clear.
How to measure progress in this chapter and when it enters a cumulative mock.
What to do after finishing the chapter and how it connects to the next unit.
Note: for the official examinable syllabus of each school year, always confirm with the school, tutor, and current Ministry/IEP announcements.
