Pick the formula

Exercise and reference answers

Questions

1. Question

   Perimeter of a square of side a

   Choices

   1. 4a
   2. 3a
   3. 2a

   Correct choice

   4a

2. Question

   Perimeter of a rectangle a by b

   Choices

   1. a + b
   2. 2(a + b)
   3. ab

   Correct choice

   2(a + b)

3. Question

   Circumference of a circle of radius r

   Choices

   1. pi r
   2. pi r squared
   3. 2 pi r

   Correct choice

   2 pi r

4. Question

   Area of a triangle

   Choices

   1. Half base x height
   2. Base x height
   3. Base + height

   Correct choice

   Half base x height

Instructions

Tap the correct formula for each shape.

Explanation