ACT Preparation / Unit 14 ACT 1302 short lesson, about 20 seconds
Parallelograms and Trapezoids
Captions available
The idea
A parallelogram's area is base times height. A trapezoid's area is one half the height times the sum of its two parallel bases.
In practice
A trapezoid with bases 8 and 12 and height 5 has area ½ × 5 × 20 = 50.
Where people slip
Use the perpendicular height, not the slanted side, for both.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for ACT Preparation