Getty Images
Gavins Point Dam Outflow - Aerial View - Nebraska, Knox County, United States
Gavins Point Dam Outflow - Aerial View - Nebraska, Knox County, United States
Getty Images
HD Time-lapse: High-angle view of the Pattaya city in the Sunrise.
HD Time-lapse: High-angle view of the Pattaya city in the Sunrise.
Getty Images
panning: herd of people on the beach of Ko Larn Island, Chonburi
panning: herd of people on the beach of Ko Larn Island, Chonburi
Getty Images
panning: Speed boats waiting traveler on beach of Ko Larn Island
panning: Speed boats waiting traveler on beach of Ko Larn Island
Getty Images
Hartland Point - Aerial View - England, Devon, Torridge District, United Kingdom
Hartland Point - Aerial View - England, Devon, Torridge District, United Kingdom
Getty Images
Timelapse of sunrise over the mountain, Samet nang she
Timelapse of sunrise over the mountain, Samet nang she, Phangnga, Thailand
Getty Images
brown cat eating grass close up shot human hand
brown cat eating grass close up shot human hand
Khan Academy
Acute Right and Obtuse Angles, Angles and Intersecting Lines, Geometry
This resource highlights the basics of working with angles and could provide a sound introductory activity for students who are beginning to learn about angles. Eager mathematicians will be introduced to the terminology associated with...
Khan Academy
Khan Academy: Geometry: Measuring Angles in Degrees
Explains how to measure an angle in degrees using a protractor. Defines acute, right, and obtuse angles. Practice problems available. [8:22]
Khan Academy
Khan Academy: Geometry: Acute, Obtuse, and Right Angles
Demonstrates how to find all acute, obtuse, and right angles in a given diagram. [6:35]
Khan Academy
Khan Academy: Measuring Angles in Degrees
Explains what a protractor is and how it is used to measure the size of angles. Also discusses the different types of angles. [8:23]
CK-12 Foundation
Ck 12: Elem Math: Overview of Classification of Angles
[Free Registration/Login may be required to access all resource tools.] Video describing four types of angles - right, acute, obtuse and straight. [1:19]