7.4 Warm-Up: Area Review

 $A=bh\ \ \ or\ \ \ \ A=lw$  

Area of a rectangle equals the base times the height, or...

Area of a rectangle equals the length times the width

 $A=\frac{1}{2}bh$  

Area of a triangle is half of the base of the triangle times the height of the triangle (base of the triangle times the height of the triangle, divided by 2)

REMEMBER: the base is always a side, and the height is always a right angle to the base

 $A=\pi r^2$  

Area of a circle equals 3.14 times the radius, times the radius again

REMEMBER: radius is halfway across the circle

Area of a compound figure can be found by:

1) identify the shapes in the compound figure

2) calculate the area of each shape

3) add the areas together