9. Example:
Find the Area of trapezoid DPRS.
18 cm
Solution:
A= ½(b1+b2)h
=1/2 (18cm+30cm)(12cm)
=288cm² 30 cm
12 cm
10. Example:
• Find the height of the trapezoid if its area is
16cm², b1= 4cm and b2=2.4cm.
Solution:
h= 2A/b1+b2
= 2(16cm²)/ 4cm+2.4cm
=32cm²/6.2cm
=5cm
11. Example:
• The bases of a trapezoid are
2 and 4 times the height.
The area is 108cm². Find the
height and the bases of the
trapezoid.