Naming and Measuring Angles

Presentation

•

Mathematics

•

10th Grade

•

Practice Problem

•

Medium

•

CCSS

4.MD.C.6, 4.G.A.1, HSG.CO.A.1

Standards-aligned

Nico Calunia

Used 1+ times

FREE Resource

10 Slides • 22 Questions

Naming and Measuring Angles

By Nico Calunia

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Open Ended

What is the difference between a LINE and a RAY?
Hint: You may use these words - line, ray, arrows, direction

Type response here

Objectives:

We will...

name angles using its vertex or usiing 3 letters
measure angles using a protractor

Multiple Choice

What geometric figure uses this "∠" symbol?

square

triangle

angle

line

Open Ended

Where have you seen angles in real life?

Type response here

Naming Angles

Summary

The sides of an angle are made of rays.
Points can be found inside (interior region), outside (exterior region) or on the angle itself.

Sides and Regions

An angle is formed by 2 rays with a common endpoint.
An angle is named using its vertex (1 letter) or with
3 letters (vertex in the middle).

Form and Name

Multiple Choice

How many rays are needed to form an angle?

Multiple Choice

What is the name of the common endpoint of an angle?

Angle Point

Angle Corner

Angle Base

Vertex

Multiple Select

How many letters are used to name an angle?

Check all that applies.

1 letter

2 letters

10 letters

3 letters

Multiple Choice

Is ∠XYZ the same as ∠ZYX?

Yes

Multiple Select

What are the possible names of this angle? Check all that applies.

∠A

∠CBA

∠ABC

∠B

Multiple Select

What are the possible names of this angle? Check all that applies.

∠EDC

∠DEC

∠D

∠E

Multiple Choice

Does Y lie in the interior or in the exterior of ∠VWX?

interior

exterior

neither

Multiple Choice

Analyze:
If points D, E, and F form an angle with E as the vertex, how would you write this angle?

∠EFD

∠FDE

∠DEFJ

∠DEF

Measuring Angles

Match

Match the illustrations with the kind of angles.

right angle

acute angle

obtuse angle

How to use a protractor?

Place the midpoint of protractor at the vertex.
Align one ray with the zero line.
Read the number on the correct scale (inner or outer).

Multiple Choice

What is the measurement of this angle?

150°

90°

180°

120°

Multiple Choice

What is the measurement of this angle?

150°

90°

180°

120°

Multiple Choice

What is the measurement of this angle?

115°

70°

130°

100°

Multiple Choice

What is the measurement of this angle?

60°

125°

65°

70°

Multiple Choice

What is the measurement of this angle?

130°

145°

160°

35°

Multiple Choice

What is the measurement of this angle?

45°

90°

120°

60°

Multiple Choice

What is the measurement of this angle?

35°

90°

45°

60°

Multiple Choice

What is the measurement of this angle?

30°

90°

60°

45°

Paper Work

Reorder

Reorder the following:
How to Use a Protractor

Place midpoint of protractor at vertex.

Align one ray with the zero line.

Read the number on the correct scale.

Open Ended

CLOSING: What is the use of a protractor?

Type response here

Naming and Measuring Angles

By Nico Calunia

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