WE
90
How many degrees in a triangle?
180
How many degrees in a circle?
360
What is a scalene triangle?
A triangle with no congruent sides or angles.
What is an isosceles triangle?
A triangle with two congruent sides and two congruent base angles.
What is an acute angle?
An angle that is less than 90 degrees
What is an obtuse angle?
An angle that is more than 90 degrees but less than 180 degrees.
What is are congruent angles?
Angles that have the same angle measurements.
What are complementary angles?
Two angles that add to 90 degrees.
What is an equilateral triangle?
A triangle with three congruent sides and angles.
What are adjacent angles?
Two angles that have a common side and common vertex.
What are vertical angles?
Two angles that are across from each other and congruent (equal).
What are supplementary angles?
Two angles that add up to 180 degrees.
What is an acute triangle?
A triangle with three acute angles.
What is an obtuse triangle?
A triangle with one obtuse angle.
Angles 1 and 2 are complementary. If angle 1 is 55, what is angle 2?
35 degrees
Angles 3 and 4 are supplementary. If angle 3 is 130, what is angle 4?
50 degrees
92 degrees
Angles C and D are complementary. Angle C is 41, what is angle D?
49 degrees
Can you form a triangle with the sides 3cm, 4cm, and 8cm?
No
Angle A and B are vertical. What is x?
Angle A = 5x-10
Angle B = 60
5x-10=60
5x=70
x=14
Angle A and B are supplementary. What is x?
Angle A = 2x+3
Angle B = x-6
(2x+3)+(x-6)=180
3x-3=180
3x=183
x=61
Angle A and B are complementary. What is x?
Angle Angle A = 3x
Angle B = x
3x + x = 90
4x = 90
x = 22.5
Angles C and D are supplementary. What is x?
Angle C = 2x + 60
Angle D = x
2x+60+x=180
3x+60=180
3x=120
x=40
A triangle has three angles of 31 degrees, 115 degrees, and x. What is x?
115+31=146
180-146=34
x=34 degrees