Small practice. Bright discoveries.Explore the free starter collection
worksheetstudio.
Sign in
Back to worksheets
ReasoningAges 4-6

Combined sides of polygons

Combine multiple polygons and calculate the total number of straight sides altogether. Review suitability for your learners before teaching.

New variationTry interactive challengeBrowse templates
Age band:Ages 4-6Ages 7-9

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 4-6

Combined sides of polygons

Take your time. Show your thinking.

  1. 1. How many sides are there altogether in 5 decagons and 1 octagon?

    5 · 1 · Combined sides of polygons

  2. 2. How many sides are there altogether in 3 pentagons and 1 hexagon?

    3 · 1 h · Combined sides of polygons

  3. 3. How many sides are there altogether in 3 octagons and 1 heptagon?

    3 · 1 h · Combined sides of polygons

  4. 4. How many sides are there altogether in 3 pentagons and 1 nonagon?

    3 · 1 · Combined sides of polygons

  5. 5. How many sides are there altogether in 4 squares and 1 heptagon?

    4 s · 1 h · Combined sides of polygons

  6. 6. How many sides are there altogether in 2 nonagons and 1 square?

    2 · 1 s · Combined sides of polygons

  7. 7. How many sides are there altogether in 2 nonagons and 1 decagon?

    2 · 1 · Combined sides of polygons

  8. 8. How many sides are there altogether in 3 squares and 1 heptagon?

    3 s · 1 h · Combined sides of polygons

  9. 9. How many sides are there altogether in 5 nonagons and 1 decagon?

    5 · 1 · Combined sides of polygons

  10. 10. How many sides are there altogether in 4 decagons and 1 nonagon?

    4 · 1 · Combined sides of polygons

  11. 11. How many sides are there altogether in 5 octagons and 1 pentagon?

    5 · 1 · Combined sides of polygons

  12. 12. How many sides are there altogether in 2 heptagons and 1 nonagon?

    2 h · 1 · Combined sides of polygons
12 questions · Seed 104731 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 4-6

Combined sides of polygons

Answers and reasoning. Review before teaching.

  1. 1. How many sides are there altogether in 5 decagons and 1 octagon?

    58

    Each decagon has 10 sides and a octagon has 8 sides: 5 × 10 + 8 = 58.

  2. 2. How many sides are there altogether in 3 pentagons and 1 hexagon?

    21

    Each pentagon has 5 sides and a hexagon has 6 sides: 3 × 5 + 6 = 21.

  3. 3. How many sides are there altogether in 3 octagons and 1 heptagon?

    31

    Each octagon has 8 sides and a heptagon has 7 sides: 3 × 8 + 7 = 31.

  4. 4. How many sides are there altogether in 3 pentagons and 1 nonagon?

    24

    Each pentagon has 5 sides and a nonagon has 9 sides: 3 × 5 + 9 = 24.

  5. 5. How many sides are there altogether in 4 squares and 1 heptagon?

    23

    Each square has 4 sides and a heptagon has 7 sides: 4 × 4 + 7 = 23.

  6. 6. How many sides are there altogether in 2 nonagons and 1 square?

    22

    Each nonagon has 9 sides and a square has 4 sides: 2 × 9 + 4 = 22.

  7. 7. How many sides are there altogether in 2 nonagons and 1 decagon?

    28

    Each nonagon has 9 sides and a decagon has 10 sides: 2 × 9 + 10 = 28.

  8. 8. How many sides are there altogether in 3 squares and 1 heptagon?

    19

    Each square has 4 sides and a heptagon has 7 sides: 3 × 4 + 7 = 19.

  9. 9. How many sides are there altogether in 5 nonagons and 1 decagon?

    55

    Each nonagon has 9 sides and a decagon has 10 sides: 5 × 9 + 10 = 55.

  10. 10. How many sides are there altogether in 4 decagons and 1 nonagon?

    49

    Each decagon has 10 sides and a nonagon has 9 sides: 4 × 10 + 9 = 49.

  11. 11. How many sides are there altogether in 5 octagons and 1 pentagon?

    45

    Each octagon has 8 sides and a pentagon has 5 sides: 5 × 8 + 5 = 45.

  12. 12. How many sides are there altogether in 2 heptagons and 1 nonagon?

    23

    Each heptagon has 7 sides and a nonagon has 9 sides: 2 × 7 + 9 = 23.

12 questions · Seed 104731 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 4-6

Combined sides of polygons

Take your time. Show your thinking.

  1. 1. How many sides are there altogether in 5 decagons and 1 octagon?

    5 · 1 · Combined sides of polygons

  2. 2. How many sides are there altogether in 3 pentagons and 1 hexagon?

    3 · 1 h · Combined sides of polygons

  3. 3. How many sides are there altogether in 3 octagons and 1 heptagon?

    3 · 1 h · Combined sides of polygons

  4. 4. How many sides are there altogether in 3 pentagons and 1 nonagon?

    3 · 1 · Combined sides of polygons

  5. 5. How many sides are there altogether in 4 squares and 1 heptagon?

    4 s · 1 h · Combined sides of polygons

  6. 6. How many sides are there altogether in 2 nonagons and 1 square?

    2 · 1 s · Combined sides of polygons

  7. 7. How many sides are there altogether in 2 nonagons and 1 decagon?

    2 · 1 · Combined sides of polygons

  8. 8. How many sides are there altogether in 3 squares and 1 heptagon?

    3 s · 1 h · Combined sides of polygons

  9. 9. How many sides are there altogether in 5 nonagons and 1 decagon?

    5 · 1 · Combined sides of polygons

  10. 10. How many sides are there altogether in 4 decagons and 1 nonagon?

    4 · 1 · Combined sides of polygons

  11. 11. How many sides are there altogether in 5 octagons and 1 pentagon?

    5 · 1 · Combined sides of polygons

  12. 12. How many sides are there altogether in 2 heptagons and 1 nonagon?

    2 h · 1 · Combined sides of polygons
12 questions · Seed 104731 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 4-6

Combined sides of polygons

Answers and reasoning. Review before teaching.

  1. 1. How many sides are there altogether in 5 decagons and 1 octagon?

    58

    Each decagon has 10 sides and a octagon has 8 sides: 5 × 10 + 8 = 58.

  2. 2. How many sides are there altogether in 3 pentagons and 1 hexagon?

    21

    Each pentagon has 5 sides and a hexagon has 6 sides: 3 × 5 + 6 = 21.

  3. 3. How many sides are there altogether in 3 octagons and 1 heptagon?

    31

    Each octagon has 8 sides and a heptagon has 7 sides: 3 × 8 + 7 = 31.

  4. 4. How many sides are there altogether in 3 pentagons and 1 nonagon?

    24

    Each pentagon has 5 sides and a nonagon has 9 sides: 3 × 5 + 9 = 24.

  5. 5. How many sides are there altogether in 4 squares and 1 heptagon?

    23

    Each square has 4 sides and a heptagon has 7 sides: 4 × 4 + 7 = 23.

  6. 6. How many sides are there altogether in 2 nonagons and 1 square?

    22

    Each nonagon has 9 sides and a square has 4 sides: 2 × 9 + 4 = 22.

  7. 7. How many sides are there altogether in 2 nonagons and 1 decagon?

    28

    Each nonagon has 9 sides and a decagon has 10 sides: 2 × 9 + 10 = 28.

  8. 8. How many sides are there altogether in 3 squares and 1 heptagon?

    19

    Each square has 4 sides and a heptagon has 7 sides: 3 × 4 + 7 = 19.

  9. 9. How many sides are there altogether in 5 nonagons and 1 decagon?

    55

    Each nonagon has 9 sides and a decagon has 10 sides: 5 × 9 + 10 = 55.

  10. 10. How many sides are there altogether in 4 decagons and 1 nonagon?

    49

    Each decagon has 10 sides and a nonagon has 9 sides: 4 × 10 + 9 = 49.

  11. 11. How many sides are there altogether in 5 octagons and 1 pentagon?

    45

    Each octagon has 8 sides and a pentagon has 5 sides: 5 × 8 + 5 = 45.

  12. 12. How many sides are there altogether in 2 heptagons and 1 nonagon?

    23

    Each heptagon has 7 sides and a nonagon has 9 sides: 2 × 7 + 9 = 23.

12 questions · Seed 104731 · Age guidance, not curriculum certification