Angles

Presentation

•

Mathematics

•

1st - 5th Grade

•

Easy

•

CCSS

4.G.A.1, 4.G.A.2, 4.MD.C.5

Standards-aligned

Vihana Keshari

Used 4+ times

FREE Resource

12 Slides • 32 Questions

The Fun Lesson on Angles: Shapes, Turns, and Corners!

Hello future Math Masters! Today, we're going on an adventure to explore the coolest part of shapes: Angles!

1. What is an Angle?

Imagine two lines starting from the exact same point and spreading out like the hands of a clock or the blades of a pair of scissors. The space between those lines is what we call an Angle.

An angle has three main parts:

Vertex: This is the starting point, the sharp corner where the two lines meet. (Think of it as the V of the angle.)
Arms (or Sides): These are the two straight lines that spread out from the vertex.

By Vihana Keshari

2. How Do We Measure Angles?

We use a special unit to measure angles, just like we use centimeters or inches to measure length.

This unit is called a Degree, and we write it with a little circle: o.
A full circle is 360 degree.

Angles are measured using a tool called a Protractor.

The bigger the spread between the two arms, the bigger the angle's degree measure will be!

3. The Four Super Types of Angles
All angles fit into special categories based on how big they are. We'll learn the four main types!

Type 1: The Right Angle 90 degree

Type 2: The Acute Angle (Less than 90 degree)

Type 3: The Obtuse Angle (More than 90 degree)

Type 4: The Straight Angle (180 degree)

Understanding Acute Angles
(Less than 90 degree):-

Understanding 90 degree:-

Understanding obtuse angles
(More than 90 degree):-

Multiple Choice

What does the image show?

acute angles

right angles

straight angles

obtuse angles

Multiple Choice

Which angle type is pictured?

Acute

Right

Obtuse

Straight

Multiple Choice

The angles are acute

The angles are right

The angles are obtuse

Multiple Choice

The slices are acute angles

The slices are right angles

The slices are obtuse angles

Multiple Choice

Acute

Right

Obtuse

Multiple Choice

Which type of angle is pictured?

Acute

Right

Obtuse

Straight

Multiple Choice

Name this angle.

acute

right

obtuse

none of the above

Multiple Choice

What type of angle is this?

^acute

obtuse

right

straight

Multiple Choice

Which angle type is pictured?

Acute

Right

Obtuse

Straight

Fill in the Blanks

Type answer...

Multiple Choice

Which correctly describes the angles that appear in the picture?

1 acute angle

1 obtuse angle

1 right angle

0 acute angles

0 obtuse angles

3 right angles

2 acute angles

0 obtuse angles

1 right angle

0 acute angles

2 obtuse angles

1 right angle

Multiple Select

Which 2-D figures have a right angle?

Multiple Choice

This is a pentagon. Pentagons have...

5 sides and 5 angles

2 sides and 3 angles

3 sides and 2 angles

Multiple Choice

Blue outline is an example of...

Angle

Line

Ray

Multiple Choice

Is this an open or a closed shape?

Open

Closed

Multiple Choice

What kind of angle is this?

obtuse angle

acute angle

right angle

Multiple Choice

What is the angle that we could find at this clock?

Right angle

Obtuse angle

Acute angle

Multiple Choice

How many acute angles that we can see on this star?

Multiple Choice

Which clock below shows the Right angle?

Multiple Choice

The name of the angles on red circle is Obtuse Angles.

True

False

Multiple Choice

Classify the angle above?

Obtuse

Acute

Straight

Right

Multiple Choice

Which of the road signs below has corners formed with only acute angles?

Multiple Choice

What is the name of the angle shown above?

Acute

Obtuse

Straight

Right

Multiple Choice

which angle is of 180 degree ?

Multiple Select

Which angles are obtuse?

Select all that apply.

Multiple Choice