Transcript 1-4 Angle Pairs - Tamalpais Union High School District

Warm Up 9/4, 5
Find the distance (units) and the midpoint (ordered pair) between
these two points shown. Leave answers precise and simplified.
a) (5, 13) & (9, 10)
b) ( –2 , 6) & ( –7 , –6)
Pythagorean Theorem
In a right triangle,
a2 + b2 = c2
c is the hypotenuse
(longest side,
opposite the right ∠)
a and b are the legs (shorter sides that form the right angle)
Use the Pythagorean Theorem to find the distance between the
two points.
a) (5, 13) & (9, 10)
b) ( –2 , 6) & ( –7 , –6)
Objective
SWBAT classify angles and identify
relationships among them.
exterior
interior
Angle Addition Postulate
Congruent Angles
Congruent angles are angles that
have the same measure.
Angle Bisector
An angle bisector is a ray that divides an
angle into two congruent angles.
Make sure to mark ≅ angles
1-4 Pairs of Angles
1-4 Angle Pairs
Jigsaw Activity
• How it works:
– Each team will be assigned to one type of angle pair.
– As a team, research your angle pair.
• No more than 2 electronic devices per group
– Fill in the space for your angle pair with its definition
and a diagram.
– EVERYONE Be prepared to explain your angle pair to
others.
Jigsaw Activity
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•
•
•
Teams 7 : adjacent angles
Teams 1 & 2: linear pair (compare 2 sources)
Teams 3 & 6: vertical angles
Teams 4 & 5: complementary and supplementary
angles
• You have 7 minutes to research your angle pair
and fill in the graphic organizer with its definition
and a diagram.
Jigsaw Activity
When I tell you to, you will move to your new
group* and do the following:
• Teach your classmates about your angle pair.
– Make sure everyone understands.
• Complete your graphic organizers with the
information you have learned.
– Make sure you have a definition and a diagram for
each angle pair.
*New group assignments on next slide.
Jigsaw Activity
A’s go to tables 1 and 2
B’s go to tables 3 and 4
C’s go to tables 5 and 6
D’s go to tables 7 and 8
Jigsaw Activity
• Teach your classmates about your angle pair.
– Make sure everyone understands.
• Complete your graphic organizers with the
information you have learned.
– Make sure you have a definition and a diagram for
each angle pair.
1-4 Angle Pairs
Next to each
other
Next to each
other and form
a straight line
Add to 90˚
Not next to
each other;
formed by two
intersecting
lines and are ≅
Add to 180˚
Please return to your team.
Complete 1-4 Practice B as a team.