Geometry Flashcards
6 cards from real IMO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Geometry flashcards as text
Which quadrilateral has exactly one pair of parallel sides?
Answer: Trapezoid
A trapezoid (also called a trapezium) has exactly one pair of parallel sides.
What is the area of a square with perimeter 24 cm?
Answer: 36 cm²
Each side = 24 ÷ 4 = 6 cm; Area = 6² = 36 cm².
In a circle, what is the longest chord called?
Answer: Diameter
The diameter is the longest chord of a circle, passing through the center.
A triangle has sides of 5 cm, 5 cm, and 8 cm. What type of triangle is it?
Answer: Isosceles
An isosceles triangle has exactly two equal sides, which matches the 5 cm, 5 cm, 8 cm triangle.
What is the total surface area of a cube with side 3 cm?
Answer: 54 cm²
A cube has 6 faces; Total surface area = 6 × side² = 6 × 9 = 54 cm².
The exterior angle of a regular polygon is 45°. How many sides does it have?
Answer: 8
Number of sides = 360° ÷ exterior angle = 360° ÷ 45° = 8.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- imo-official.org — Test delivery, eligibility, passing score, test dates, exam format · verified Oct 2026
- imo2027.hu — Exam dates, registration deadline · verified Oct 2026