Area and Perimeter of 2D Shapes Review

Area is...

• the measure, in square units, of the exterior of a plane figure.

• the distance around a closed 2-dimensional figure or shape.

• the measure, in square units, of the interior of a plane figure.

• the distance inside a closed 2-dimensional figure or shape.

True or False?

Perimeter is the distance around a closed 2-dimensional figure or shape.

• False

• True

Circumference is different from Perimeter.

• False

• True

What line segment(s) are considered to be the radius of the circle?

• Line Segment  $\overline{CG}$  

• Line Segment  $\overline{FC}$  

• Line Segment  $\overline{FG}$  

• Line Segment  $\overline{CF}$  

• Line Segment  $\overline{GC}$  

How do you find perimeter?

• Subtract all the sides

• Divide all the sides

• Multiply all the sides

• Add all the sides

What are the formula(s) for the circumference of a circle?

•  $C=2\pi r$  

•  $C=\pi d$  

•  $C=\pi r^2$  

What are the formula(s) to find the area of a triangle?

•  $A=\frac{1}{2}bh$  

•  $A=\frac{bh}{2}$  

•  $A=0.5bh$  

• All of the above

What is the perimeter formula for a polygon (ie. square AND rectangle)?

•  $P=2l+2w$  

•  $P=2\left(l+w\right)$  

•  $P=s_1+s_2+s_3+s_4$  

•  $P=s^2$  

What is the area formula for a trapezoid

• $A=\frac{1}{2}h\left(b_1\div b_2\right)$

• $A=\frac{1}{2}h\left(b_1+b_2\right)$

• $A=\frac{1}{2}h\left(b_1\times b_2\right)$

• $A=\frac{1}{2\ }h\left(b_1-b_2\right)$

Identify this shape

• Rhombus

• Parallelogram

• Square

• Trapezoid

• Circle