Chapter 8 ­ Area Formulas
Square
s2 or lw
Rectangle
lw or bh
Triangle
1/2bh
Rhombus
1/2d1d2 or bh
Parallelogram
bh
Trapezoid
1/2(h)(b1 + b2)
Kite
1/2d1d2
Examples:
1. A square has the area of 121 cm2. What is the perimeter?
2. The area of a triangle is 60 cm2 and the height is 8 cm. What is the length of the base?
3. The area of a trapezoid is 60 in.2, the longer base is 10 in., and the shorter base is half the longer base. What is the height?
4. The base of a 15 ft ladder is placed 9 ft from a wall. How far up the wall will the ladder reach?
5. A square has a diagonal of . Find the area.
6. Find the area of the green region.