Supplementary angles
A supplementary angle is?
Two angles whose sum is 180°
A complementary angle is?
Two angles who's sum is 90°
When two angles add up to 90°
Complementary Angle
An angle that is 90°
Right Angle
∠ABC is intersected by line EB
∠ABC = 180
∠ABE = 12x+67-79
∠EBC = 3x-15(3)
x = 79/5
x + 73.25 is a supplementary angle
Solve for x
X = 106.75
x + 13.995 is a complementary angle
Solve for x
x = 76.005
When two angles add up to 180°
Supplementary Angles
At angle that is 180°
Straight angle
Line EB Bisects ∠ABC
ABC = 83.5
Find m∠ABE
∠ABE= 41.75
Angle ABC is supplementary.
Line DB bisects angle ABC.
Line EB bisects angle DBC.
m∠EBC= ?
m∠EBC=v 45°
∠ABC is complementary
Line EB bisects ∠ABC
Line FB Bisects ∠EBC
Find m∠FBC
FBC = 22.5°
When two Angles have a common side and vertex
Adjacent angles
An angle that is less than 180° and more than 90°
Obtuse angle
The five main angles are
Acute, obtuse, straight, right and complete
∠POQ is supplementary
∠POS =5x+4
∠SOR = x-2
∠ROQ = 3x+7
Solve for x
x=19
∠ABC is complementary
∠ABD = X+21(4)
∠BDC = 3x-22
x = 7
A pair of opposite angles formed by intersecting lines
Vertical Angles
An angle that is less than 90°
Acute angle
m∠ABC = 13x(3)-34
m∠CBD = 3x-18
m∠DBE = x+78-6
∠ABE is a straight angle
Find m∠ABE
∠ABE = 180
ABC is a supplementary angle
Line DB bisects ∠ABC
∠ABD = 12x-13+5
∠DBC = 12(4x-3)+14
Solve for x
x = 7/2
∠ABC is complementary
Line EB intersects ∠ABC
∠ABE = 21x-13(-3)
∠EBC = 3x(23-6)
x = 17/24
Angles that have equal sides
Congruent Angles
An angle that is 360°
A complete angle
How do you name an angle
By the vector, 3 points or a number