Formulas
Which shape uses the formula: A = l × w
Rectangle
Find the area of a rectangle with length 6 and width 4
24 units2
Find the perimeter of a rectangle with length 9 and width 4
26 unites
A quadrilateral with 4 equal sides and 4 right angles
Square
A garden is 5 by 7 meters. What is the area?
35 m2
Which shape uses the formula: A = ½ × b × h
Triangle
A circle has a radius of 6. What is the area? Round to the nearest tenth and use π ≈ 3.14
113.1 units2
Find the perimeter of a square with side length 5
20 units
A shape with exactly one pair of parallel sides
Trapezoid
A triangular flag has base 8 and height 6. What is the area?
24 units²
Which shape uses the formula: A = πr2
Circle
Find the area of a trapezoid with bases 6 and 10 and height 4
32 units2
Find the circumference of a circle with the radius of 9 (use π ≈ 3.14)
56.55
A parallelogram with all sides equal
Rhombus
A circular pizza has radius 5. What is the area? (π ≈ 3.14)
78.5 units²
Which shape uses the formula: A = ½ × (b₁ + b₂) × h
Trapezoid
Find the area of a triangle with base 10 and height 5
25 units2
Find the circumference of a circle with radius 3 (use π ≈ 3.14)
18.84 units
A quadrilateral with diagonals that bisect each other at right angles
Rhombus or Kite
A trapezoid has bases 12 and 18 and height 5. What is the area?
75 units²
Which shape uses the formula: A = ½ × d₁ × d₂
Kite or Rhombus
A rhombus has diagonals of 12 and 8. What is the area?
48 units2
Find the circumference of a circle with diameter 12 (use π ≈ 3.14)
37.68 units
A parallelogram with four right angles
Rectangle or square
A rectangular field is 20 by 15. A path 2 units wide goes around it. Is the total area with the path larger or smaller than 300? Explain why.
Larger because the area of the field is 300 so the path adds more area to that.