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
What is the sum of interior angles of a triangle?
Answer: 180°
The interior angles of any triangle always add up to 180°.
A rectangle has a length of 12 cm and a width of 5 cm. What is its perimeter?
Answer: 34 cm
Perimeter = 2 × (length + width) = 2 × (12 + 5) = 2 × 17 = 34 cm.
A circle has a radius of 7 cm. What is its area? (Use π ≈ 22/7)
Answer: 154 cm²
Area = π × r² = (22/7) × 7² = (22/7) × 49 = 154 cm².
Which of the following is a property of an equilateral triangle?
Answer: All sides are equal
An equilateral triangle has all three sides equal and all three angles equal to 60°.
What is the area of a triangle with base 10 cm and height 6 cm?
Answer: 30 cm²
Area of a triangle = (1/2) × base × height = (1/2) × 10 × 6 = 30 cm².
How many lines of symmetry does a square have?
Answer: 4
A square has 4 lines of symmetry: two along the diagonals and two along the midpoints of opposite sides.