Lesson 1Primary school~10 minContinue here
Perimeter and Area of a Square
Perimeter P = 4a, area A = a² and the difference between them
Mathematics · Topic 6 of 7
Geometry
Perimeter and area of shapes, right triangles and calculations in the plane
- 2 lessons
- ~22 min
- 3 visualizations
- Mastery test
Lessons
Work through them in order – each builds on the one before.
- 1
- 2
Lesson 2Primary school~12 min
The Pythagorean Theorem
Hypotenuse, legs and calculations in a right triangle
The goal of this topic
Once the lessons are behind you, prove you really know the topic. Three levels – easy, hard and expert.
Mastery test
Geometry
Perimeter and area of a square, and right triangles at work: diagonals, heights, rhombi, trapezoids, distances between points, circles and solids.
- 20 questions
- 100% required
- Increasing difficulty
Mastery
Three levels. Only 100% unlocks each one.
0 of 3 levels mastered
- Easy
Basic understanding
20 questions · 100% to master
- Best score
- -
- Attempts
- 0
- HardLocked
Advanced understanding
20 questions · 100% to master
- Best score
- -
- Attempts
- 0
Score 100% on Easy Mastery to unlock this level.
- ExpertLocked
Deep understanding
20 questions · 100% to master
- Best score
- -
- Attempts
- 0
Score 100% on Hard Mastery to unlock this level.