what are angles? amanda mcelveen 4 th grade. amanda mcelveen2 what is a ray? a ray is a...
TRANSCRIPT
Amanda McElveen 2
What is a Ray?
• A ray is a “straight” line that begins at a certain point but extends forever in one direction.
Amanda McElveen 3
What is an Angle?
• Two rays that share the same endpoint form an angle.
Vertex
Ray 1
Ray 2
Angle
Amanda McElveen 4
What is a Right Angle?
• A right angle is two rays that meet at a right angle.
Ray 1
Ray 2Vertex
Right Angle
Example
Ray 1
Ray 2
Right Angle
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What is a Acute Angle?
• An acute angle is an angle measuring less than a right.
Vertex
Ray 1
Ray 2
Acute Angle
Example
Ray 1
Ray 2
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What is an Obtuse Angle?
• An obtuse angle is an angle that measure greater than a right angle but less than a straight line.
Right Angle
Straight Line
Obtuse angle
Example
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Quiz Time!
• You will need paper and pencil.
• For each example following write if it is a right angle, obtuse angle, or acute angle.
• Correct answers will follow the quiz.
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Example Question
What kind of angle is this?
A. Right Angle
B. Obtuse Angle
C. Acute Angle
Answer:
C. Acute Angle
Leonardo da Vinci: Vitruvian Man
Amanda McElveen 9
Question 1
What kind of angle is this?
A. Right Angle
B. Obtuse Angle
C. Acute Angle
Leonardo da Vinci: The Last Supper
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Question 2
What kind of angle is this?
A. Right Angle
B. Obtuse Angle
C. Acute Angle
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Question 3
What kind of angle is this?
A. Right Angle
B. Obtuse Angle
C. Acute Angle
Jacques-Louis David:
The Death of Marat
Amanda McElveen 12
Question 4
Pietro Ronzelli: Nativita di Maria
What kind of angle is this?
A. Right Angle
B. Obtuse Angle
C. Acute Angle
Amanda McElveen 13
Question 5
What kind of angle is this?
A. Right Angle
B. Obtuse Angle
C. Acute Angle
Pablo Picasso