IMO Practice Test — 2D Shapes & Symmetry
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
medium
How many corners do a triangle and a pentagon have altogether?
8
7
9
10
Explanation: 3 + 5 = 8 corners.
Question 2 of 6
hard
Total number of sides on one triangle, one square and one pentagon is…
12
11
13
10
Explanation: 3 + 4 + 5 = 12 sides.
Question 3 of 6
hard
A regular polygon with 8 equal sides has how many lines of symmetry?
8
4
2
6
Explanation: A regular octagon has 8 lines of symmetry.
Question 4 of 6
medium
How many more sides does a hexagon have than a triangle?
3
2
4
6
Explanation: 6 − 3 = 3 more sides.
Question 5 of 6
medium
Which letter has NO line of symmetry?
R
H
X
O
Explanation: The letter R cannot be folded into matching halves.
Question 6 of 6
medium
A polygon with 7 sides is a…
heptagon
hexagon
octagon
pentagon
Explanation: A 7-sided polygon is a heptagon.