Area of Triangles
Completion requirements
You can think of any triangle as half of a parallelogram! This is why its area is half that of the parallelogram: half of height times base. Watch this lecture series and complete the interactive exercises to practice using the triangle area formula.
Practice
Find missing length when given area of a triangle - Questions
1. The triangle shown below has an area of 12 units 
.
Find the missing length.
______ units
2. The triangle shown below has an area of 22 units 
.
Find the missing length.
______ units
3. The triangle shown below has an area of 40 units .
Find the missing length.
______ units
4. The triangle shown below has an area of 10 units .
Find the missing length.
______ units