Area of a parallelogram

The question
617 cm²

Area of a 6 by 17 parallelogram

How it works.

6 cm 17
  1. 01

    A parallelogram. You need its base and its height.

  2. 02

    The base is the side it stands on: 6 cm.

  3. 03

    The height is the DASHED line — straight up from the base, at a right angle to it: 17 cm. Not the sloping side.

  4. 04

    Slide the triangle off one end round to the other and it is a rectangle — same base, same height. So there is no halving here: 6 × 17 = 102 square cm.