en.wikibooks.org/wiki/Geometry/Angles

An angle is the union of two rays with a common endpoint, called the vertex. ...
complementary angles are **two angles whose sum is 90 degrees**. complementary
...

www.freemathhelp.com/angles.html

Acute - any angle which measures less than **90 degrees**. These angles ...
Complementary Angles - **Two angles whose** measures add up to **90 degrees**.
Sample: ...

www.freemathhelp.com/feliz-special-angles.html

As you may know, **two angles** are complementary if the **sum** of their degree
measures equals **90 degrees**. **Two angles**, measuring 50 degrees and 40
degrees, ...

www.brightstorm.com/math/geometry/geometry-building-blocks/supplementary-and-complementary-angles

Supplementary angles are two angles whose sum is 180 degrees while
complementary angles are **two angles whose sum is 90 degrees**. Supplementary
and ...

www.algebra.com/algebra/homework/Angles/Angles.faq.question.223720.html

SOLUTION: **Two angles** are complementary if their **sum is 90 degrees**. If two
complementary angles have the measures of x degrees and (2x - 3) degrees, find
...

www.softschools.com/math/geometry/topics/supplementary_and_complementary_angles

Complementary angles are **two angles** that have a **sum** of **90**°. There is an easy
... Supplementary angles form a straight line and have a **sum** of 180 **degrees**.

www.opsu.edu/education/Math-Ese%20Lesson%20Plans/100%20Math%20Words/Sharon%20Hampton%20100%20Word%20Vocabulary%20List%20%20%20%20%20%20Geometry.doc

Angle bisector – ray that divides an angle into two congruent adjacent angles.
Triangle – the ... Complementary angles – **two angles whose sum is 90 degrees**.

www.basic-mathematics.com/complementary-and-supplementary-angles.html

**Two angles whose** measures add to **90 degrees**. ... The following angles are also
complementary as long as the **sum** of the measures equal **90 degrees** ...

mathcentral.uregina.ca/qq/database/qq.09.99/suzanne1.html

We know that: Supplementary angles are **two angles whose sum** equals 180
degrees and complementary angles are **two angles whose sum** equals **90**
**degrees** ...