Geometry Study Guide Review

Geometry Study Guide Review

1. Can the side lengths make a triangle?

• 2, 3, 4

• 2 + 3 > 4

• 2 + 4 > 3

• 3 + 4 > 2

• Yes the side lengths make a triangle.

2.Can the side lengths make a triangle?

• 2, 2, 5

• 2 + 2 > 5

• This inequality is not true, therefore the sides cannot make a triangle.

Can the set of angles make a triangle?

• 20, 40, 30

• All triangles equal 180 degrees

• 20 + 40 + 30 =90

• The angles cannot make a triangle.

Can the set of angles make a triangle?

• 15, 35, 130

• All triangles must have 180 degrees

• 15 + 35 + 130 = 180

• The set of angles can make a triangle.

21) Find the Circumference

•  $C=\pi d$  

•  $C=\left(3.14\right)\left(10\right)$  

•  $C=31.4cm$  

• 
  

22) Find the area.

•  $A=\pi r^2$  

•  $A=\left(3.14\right)\left(5^2\right)$  

•  $A=\left(3.14\right)\left(25\right)$  

•  $A=78.5cm^2$