Angles
The 3 main types of angles in geometry
What are acute, obtuse, and right angles?
Two positive angles whose measures have a sum of 1800 are called _____________ angles.
What is supplementary?
The m∠ A is complementary to the m∠ B. The m∠ C is complementary to the m∠ B. If m∠ A = 620, what is the m∠ B and m∠ C?
m∠ B= 280 m∠ C = 620
Intersecting lines that form at a right angle.
What are perpendicular lines?
A line that has two endpoints.
What is a line segment?
An angle that is exactly 90 degrees.
What is a right angle?
If two angles form a linear pair then they are _____________.
What is supplementary?
The m∠ D is supplementary to the m∠ E. The m∠ F is supplementary to m∠ E. If m∠ F = 1130, what is the m∠ D and m∠ E?
m∠ D = 1130 m∠ E = 670
Has a starting point but no end point.
What is a ray?
An exact location in space.
What is a point?
An angle that is greater than 90 degrees.
What is an obtuse angle?
Two angles are called ____________ if they are not adjacent and their sides are formed by two intersecting lines.
What is vertical?
Two vertical angles measure 8x+6 and 4x+22. Solve for x.
x = 4
Goes on forever in both directions.
What is a line?
The interior angles sum to 180 degrees.
How many degrees is a triangle?
An angle that is less than 90 degrees.
What is an acute angle?
____________ angles are two angles that share a common vertex and side but have no common interior points.
What is adjacent?
∠1, ∠ 2, and ∠ 3 are adjacent angles. ∠ 1 is supplementary to ∠ 2 and ∠ 2 is complementary to ∠ 3. If m∠ 1 = (8x+3)0 and m∠ 2 = (5x-18)0, find m∠ 3.
m∠ 3=330
Lines that cross at one point.
What are intersecting lines?
The longest side in a right triangle.
What is the hypotenuse?
An angle that measures 180 degrees.
What is a straight angle?
Two adjacent angles whose noncommon sides are on the same line are called ____________.
What is linear pair?
Find the measure of an angle if seven times it's complement is 100 is less than three times it's supplement.
What is 250.
Lines that never intersect.
What are parallel lines?
The interior is equal to 360 degrees.
What is the degree of a circle?