Reviewing Parallel Lines and Triangle parts

Match triangle types

• Equilateral Triangle

• 
• Isosceles triangle

• 
• Scalene Triangle

• 
• Equiangular Triangle

• 
• Right Triangle

• 

I this triangle, what can I tell about the sides labeled 3x-8 and 2x?

• I know they are equal by Perpendicular Bisector Theorem

• Nothing... I don't have enough information

• They will add up to 180 degrees

• 3x-8=2/3 of 2x

What is the value of x?

• 8

• -8

• 8/5

• 5/8

What is the value of AB?

• 8

• -8

• 16

• -16

Is m the perpendicular bisector?

• yes

• no

• not enough information

Does m bisect BC?

• yes

• no

• not enough information

Angle 1 is supplementary to angle 2 is justified by :

• The sum of angles in a triangle is 180 degrees
• Angles 1 and 2 are adjacent angles
• Angle 1 is complementary to angle 2
• Linear Pair Theorem

If m<1 is 5x+10 and m<2 is 120 what is the value of x?

• 180

• 10

• 26

• 20

Given parallel lines and a transveral...

If m<1 is 40, The m<4 is ​ (a)   because of ​ (b)  

Moreover, the m<5 is also 40 because of ​ (c)  

Using vertical angles again, tells us m<8 is also 40. Or you just know they are all 40 because all of these angles are ​ (d)  

• 40
• vertical angles
• alternate interior angles.
• congruent acute angles.

Given parallel lines and a transveral...

If m<1 is 40, The m<2 is ​ (a)   because all ​ (b)   sum up to ​ (c)   , so to find all the ​ (d)  

all I need to do is ​ (e)   .

• 140
• linear pairs
• 180
• congruent obtuse angles
• 180-40