The diagram shows a square and a triangle. The triangle is formed by a corner and the midpoints of two sides of the square. The area of the triangle is 150 \text{ cm}^2. What is the perimeter of the square in centimetres?
Sign in or create an account to reveal answers, view the solution, and save your progress. Create a free account to unlock practice and keep track of your work.
Primary Mathematics Challenge 2020 (2020)
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →Primary Mathematics Challenge 2020 (2020)