9M - Chapter 3 Intro | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 23 Public

Geometry, grade 9

Study Slideshow

The root trans- means “across.” What do you think a transversal of two lines does?

crosses two lines

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The slope of a mountain trail describes the steepness of the climb. What might the slope of a line describe?

the steepness of the line in a plane

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What does the word corresponding mean? What do you think the term corresponding angles means?

matching; angles that are in matching positions

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How do you name a point on a line or in a plane?

with a single capital letter

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How do you name a line segment?

with two capital letters representing the end points; above the letters there is a straight line

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What is the definition of a linear pair?

two angles formed by opposite rays and one shared side

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Can two parallel lines ever cross?

no

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Perpendicular lines cross at what angle?

90 degrees

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Two angles whose sum is 180 degrees are called what?

Supplementary

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Two angles whose sum is 90 degrees are called what?

Complementary

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Two lines intersect at a _____.

point

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Two planes intersect at a _____.

line

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Points that lie in the same plane are called _____ .

coplanar

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Angles that are greater than 90 degrees are called _____.

obtuse

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Angles that are less than 90 degrees are called _____.

acute

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Angles that have 90 degrees are called _____ angles.

right

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