Skills · Geometry · Geometry Basics

Area of triangles and parallelograms

Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.

Problem types

Sample Sheet · Level 1

  1. a right triangle, base 5, height 656
    Find the area.
  2. a parallelogram, base 9, height 5, slant side 7975
    Find the area.
  3. a right triangle, base 11, height 121112
    Find the area.
  4. a parallelogram, base 12, height 5, slant side 61265
    Find the area.
  5. a right triangle, base 10, height 5105
    Find the area.
  6. a parallelogram, base 8, height 10, slant side 1181110
    Find the area.
  7. a parallelogram, base 9, height 3, slant side 5953
    Find the area.
  8. a right triangle, base 12, height 5125
    Find the area.

Answer key

  1. 15 square units
  2. 45 square units
  3. 66 square units
  4. 60 square units
  5. 25 square units
  6. 80 square units
  7. 27 square units
  8. 30 square units

Sample Sheet · Level 3

  1. a right triangle, base 18, height 171817
    Find the area.
  2. a triangle, the height drawn inside, base 20, height ?20?
    The area is 110. Find the height.
  3. an obtuse triangle, the height drawn outside, base 14, height 141414
    Find the area.
  4. a parallelogram, base 19, height 7, slant side 1019107
    Find the area.
  5. a parallelogram, base 18, height 12, slant side 14181412
    Find the area.
  6. a triangle, the height drawn inside, base 10, height ?10?
    The area is 45. Find the height.
  7. a right triangle, base 12, height 9129
    Find the area.
  8. a triangle, the height drawn inside, base 4, height 12412
    Find the area.

Answer key

  1. 153 square units
  2. 11 units
  3. 98 square units
  4. 133 square units
  5. 216 square units
  6. 9 units
  7. 54 square units
  8. 24 square units

Make your own

Pick the count, the level and the version, and print it with work space and the key on its own page. The same skill also makes an I Do, We Do, You Do lesson, a Mosaic, a Decoder and more.

Make it in WingitAsk your AI assistant