Vocab
Two angles that add up to 90 degrees
What are complimentary angles?
Draw a pair of vertical angles
(drawn on whiteboard)
In triangle JKL, <J measures 25.8 degrees and <K is a right angle. What is the measure of <L?
The number of triangles that can be constructed with the following characteristics:
80 degrees, 40 degrees, and 40 degrees
What is no triangle?
The middle marker on the protractor needs to line up with
What is an endpoint?
Angles that share a side and vertex; neighbor angles
What are adjacent angles?
Write and solve an equation to find the value of <A
(#2 on board)
x+90+63=180
x=27 degrees
Two sides of a triangle have lengths of 7m and 15m. Write an inequality that represents the possible length for the third side, x?
8<x<22
How many triangles will the following side lengths form? 21m, 6m, 10m
What is "no triangle?"
When constructing an angle, you always start on this side of the protractor
What is "the side that starts with zero?"
Two angles that add up to 180 degrees
What are supplementary angles?
Draw a pair of supplementary angles
Whiteboard
What sum of three angles will not form a triangle?
anything that doesn't add up to 180 degrees
How many triangles will the following side lengths form? 11m, 11m, 12m
What is "more than one?"
Two endpoints should always be connected with this
A pair of angles that are opposite of each other; congruent angles
What are vertical angles?
Draw and label an obtuse triangle
whiteboard
Bonus: Any group that answers this question correctly gets bonus points on the test.
What word describes two angles that have the same measurement or two side lengths that are equal?
What is congruent?
How many triangles can be formed by the following characteristics? 5m, 90 degrees, and 30 degrees
What is "one unique triangle?"
The biggest degree measurement on a protractor is
What is 180 degrees?
Define the following words:
1. Acute
2. Obtuse
3. Right
4. Equilateral
5. Isosceles
6. Scalene
What is:
1. less than 90 degrees
2. more than 90 degrees
3. exactly 90 degrees
4. all equal sides
5. two equal sides
6. no equal sides
Draw and label a triangle. List an angle and corresponding side length.
whiteboard
List anything that you remember about angles and triangles.
answers vary
1. What is the rule for three angle measurements?
2. What is the rule for three side lengths?
1. Three angles measurements should add up to 180 degrees
2. The two smallest side lengths should be greater than the third
Answers will vary.