Finding the area of irregular shapes
1) using subtraction 2) using addition
2 methods to find the area of an irregular shape
irregular shape
a polygon that does not have all sides and angles equal
the number of square units that covers a closed shape
area
A=lxw
area formula of a rectangle
A=1/2 bh
area formula of a triangle
find the area of the entire figure
finding the area of irregular shapes using subtraction, you first __________________________
258.5 square cm
if a triangle has a base of 17 cm and a height of 31 cm. What is the area?
base= 21 units height= 8 units
if the area of a rectangle is 168 square units. what is the base and height of the rectangle?
base= 23 inches height= 8 inches
if the area of a triangle is 92 square inches, what is the base and height of the triangle
add all the areas to find the total
using the addition method to find the area of an irregular shape the last thing you do is ______________________________________
12 ft squared
what is the area of the missing shape
84 ft squared
what is the area of this figure