Measuring and Constructing Angles Measuring and ...
Measuring
and
1-3
1-3 Measuring and Constructing Angles
Constructing Angles
Warm Up
Lesson Presentation
Lesson Quiz
Holt
Holt
McDougal
Geometry
Geometry
1-3 Measuring and Constructing Angles
Warm Up
1. Draw AB and AC, where A, B, and C are
noncollinear.
Possible answer: A
B
C
2. Draw opposite rays DE and DF.
F
Solve each equation.
3. 2x + 3 + x ¨C 4 + 3x ¨C 5 = 180 31
4. 5x + 2 = 8x ¨C 10 4
Holt McDougal Geometry
D
E
1-3 Measuring and Constructing Angles
Objectives
Name and classify angles.
Measure and construct angles and angle
bisectors.
Holt McDougal Geometry
1-3 Measuring and Constructing Angles
Vocabulary
angle
vertex
interior of an angle
exterior of an angle
measure
degree
acute angle
Holt McDougal Geometry
right angle
obtuse angle
straight angle
congruent angles
angle bisector
1-3 Measuring and Constructing Angles
A transit is a tool for measuring angles. It consists
of a telescope that swivels horizontally and
vertically. Using a transit, a survey or can measure
the angle formed by his or her location and two
distant points.
An angle is a figure formed by two rays, or sides,
with a common endpoint called the vertex (plural:
vertices). You can name an angle several ways: by
its vertex, by a point on each ray and the vertex,
or by a number.
Holt McDougal Geometry
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