Angles and Lines in Geometry

lines, angles, polygons, and triangles

by Katie Groves

​Plane

• ​Flat surface that extends without end

​Parallel lines

• Remain the same length apart and will never cross

​Perpendicular

• Lines that intersect and form 90 degree angles at the corners

Multiple Choice

Name the figure

• Line PQ

• Angle PQ

• Ray PQ

• Line P

Multiple Choice

 Name the figure 

• Line PQ

• Angle PQ

• Ray PQ

• Line P

Multiple Choice

What type of lines are these?

• Parallel

• Straight lines

• Perpendicular

• Angles

Multiple Choice

What type of lines are these? 

• Parallel

• Angles

• Perpendicular 

• Corners 

Multiple Choice

What type of angle is $$\angle CMD$$  

• Acute

• Right

• Obtuse

• Straight

Multiple Choice

What type of angle is $$\angle CMA$$  

• Acute

• Ri

• Obtuse

• Straight

Open Ended

If the measure of $$\angle DMC$$  is $$45\degree$$  then what is the measure of $$\angle CMA$$  . Explain how you found your answer

Multiple Choice

What type of angle is  $$\angle AMB$$  

• Acute 

• Right 

• Obtuse 

• Straight 

Multiple Choice

What type of angle is $$\angle AMD$$  

• Acute

• right

• Obtuse

• Straight

Multiple Choice

Which of these are polygons?

​

• ​The point where two sides of a polygon meet is called a vertex.

• ​A polygon can be identified by naming the letters of the verticies in order. We can name any letter first the rest can be named clockwise or counterclockwise

• ​Congruent figures have the same size and shape

Multiple Select

Name this polygon and is it regular or irregular

• Triangle 

• Hexagon 

• Octogon 

• regular

• irregular

Multiple Choice

Which of the following is not a way to name the rectangle? 

• ABCD

• ADCB

• BACD

• BADC

Fill in the Blanks

What is the name of the shape of a stop sign?

Open Ended

Can an equilateral triangle be an obtuse triangle?

​

​Find the area of the triangle

Fill in the Blanks

Find the area of the triangle 

Homework ​

Lesson 20 written practice 1-30