A

1
To calculate the area of triangle EAB.
1. Draw line EF parallel to line AB.
2. Join line EF to line AB at A and at B.
3. Count the number of squares in side rectangle
ABHG and divide by 2 .
Rectangle ABHG is a 6X11 grid. It has 66 squares
in it. The area of EAB is 33 units2.
G
H
E
F
B
A
2
To calculate the area of triangle EAB.
1. Measure the base.
2. Measure the height.
3. Multiply the height by the base and divide it
by 2.
Base is 11units, height is 6 units11X6 662
33 units².
Remember to measure from the base line to the
highest vertex
E
B
A