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## Right angle - Wikipedia

en.wikipedia.org/wiki/Right_angle

A right angle is equal to 90 degrees. A line segment (AB) drawn so that it forms right angles with a line (CD). In geometry and trigonometry, a right angle is an angle that bisects the angle formed ...

## How many degrees are in a right angle? | Reference.com

www.reference.com/math/many-degrees-right-angle-c504884e507c6012

A right angle has 90 degrees. Angles are measured on a scale from 0 to 360 degrees. Right angles represent one-fourth of a full 360-degree...

## Angles - Acute, Obtuse, Straight and Right - Math is Fun

www.mathsisfun.com/angles.html

Degrees (Angle) · Twitter StumbleUpon Facebook ... Angles. An angle measures the amount of turn ... Right Angle, an angle that is 90° exactly. Obtuse Angle, an ...

## How many degrees are right angles, acute ... | Khan Academy

Right angle is exactly 90 degrees. Straight angle is exactly 180 degrees. 5 Votes. • Comment on this question • Flag this comment. 3 years ago by Anonymous.

## Cool math .com - Types of Triangles

www.coolmath.com/reference/triangles-types

Definitions and formulas for triangles including right triangles, equilateral ... The right triangle has one 90 degree angle and two acute (< 90 degree) angles.

## Acute, right, & obtuse angles | Angle types | Angles | Basic geometry ...

Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees. Learn about angles types and ...

## What is a Right Angle? - Definition & Formula - Video & Lesson ...

When a triangle has a right angle, it becomes a special type of triangle called a right triangle. Right triangles always have exactly one angle that is 90 degrees.

## Trigonometry/Angles of a triangle sum to 180 Degrees - Wikibooks ...

en.wikibooks.org/wiki/Trigonometry/Angles_of_a_triangle_sum_to_180_Degrees

is a right angle, it means that the sum of the angles of any triangle is the same as two right angles. If we 'tore the corners off' and placed them together at the ...

## What are Acute, Obtuse, Right, and Straight Angles? | Virtual Nerd

www.virtualnerd.com/pre-algebra/geometry/points-lines-planes-angles/planes-angles/acute-obtuse-right-straight-angle-definition

Knowing how to identify these angles is an important part of solving many ... right angle; right angles; straight; straight angle; straight angles; degree; degrees ...

## The sum of the angles in a triangle

mathcentral.uregina.ca/QQ/database/QQ.09.06/becky1.html

We know that all the angles add up to 180 degrees but cant find a valid reason for it. Hi Becky,. Suppose that you had a right angle triangle. Note that if you take  ...