Name that Angle
Angles that add to 90 degrees
Complementary
An equilateral triangle has three _____ angles
60 degree
When two lines intersect, ____ angles are equal.
opposite
Interior angles add up to ____
180 degrees
Find the complement of 32'
58'
Angles that add to 180 degrees
Supplementary
How do you find the value of the missing angles in an isoceles triangle when you know one of the values?
Subtract known value from 180 and then divide by 2
When two lines intersect, they create four angles. The total sum of these four angles is ____
360 degrees
If a transversal intersects two lines that are not parallel, can you find alternate angles when you have one known value?
No. You can only find alternate angles when the lines are parallel.
Find the supplement of 2'
178'
Opposite angles are ____
equal to each other (congruent)
How do you find the external angle of a triangle when you know two of its' angles?
Add the two internal angles. They will equal the external angle
An angle measures 34'. What is the measure of its' opposite angle?
34 degrees.
When a transversal intersects parallel lines, how many pairs of interior angles will there be?
Two pairs
<A, C and <B, D are two pairs of opposite angles. If <A, C each equal 40', what do <B, D equal?
360 - (40+2)
360 - 80
280 / 2
<B, D equal 140' each
Alternate angles
What is the largest obtuse angle a triangle can have?
178 degrees. The other two angles would be 1'.
An angle measures 100'. What is the measure of its' supplementary angle?
80 degrees.
When a transversal intersects two parallel lines, how many pairs of alternate interior angles will there be?
Two pairs
The sum of two pairs of opposite angles in intersecting lines will always be:
360'
Equal angles that make an F shape
Corresponding
What is the smallest acute angle a triangle can have?
1'.
An angle measures 89'. What is the measure of its' complimentary angle?
1 degree.
When a transversal intersects two parallel lines, how many pairs of corresponding angles will there be?
Four pairs
An angle that measures 256' is called a ____
Reflex angle