Angles that are less than 90 degrees
acute angles
Can you draw a triangle with the following angle measures? 75 degrees, 75 degrees, and 40 degrees?
No, because 75+75+40 = 190
The name given to two angles with a sum of 180 degrees?
supplementary angles
Vertical angles are always...
Equal or congruent
Can you make a triangle with the 3 lengths below?
3 in, 5 in, 1 in
NO TRIANGLE
because 3 + 1 = 4 which is less than 5
Angles that are equal to 180 degrees
straight angles
OR
a straight line
Find the missing angle below.
The missing angle is 70 degrees.
The name given to two angles with a sum of 90 degrees.
complementary angles
What is the measurement of angle b?
b = 74
Can these 3 angles make a triangle?
20 degrees, 70 degrees, 90 degrees
20 + 70 + 90 = 180
YES, Triangle
Angles that are equal to 90 degrees
right angles
Two interior angle measures of a triangle are 74 degrees and 53 degrees. What is the measure of the third interior angle?
53 degrees
If a=65 degrees, what does b=?
b=25
Find the measurement of angle b.
b=32 degrees
Can you make a triangle with the following sides?
7 cm, 9cm, 7 cm
YES, Triangle
7 + 7 = 14 which is greater than 9
Angles that are greater than 90 degrees but less than 180 degrees
obtuse angles
Solve for h
h = 20
Solve for x:
x=16
What does x= below?
x=22
Can you make a triangle with the followign 3 angles?
30 degrees, 30 degrees, 90 degrees
30 + 30 + 90 = 150 which is not 180
NO, Triangle
The number of degrees in a triangle
180 degrees
Find X
X = 7
Solve for x:
x = 51
Find x:
x=45
Can you make a triangle with the following lengths?
4 ft, 4 ft, 4 ft
4 + 4 = 8 which is greater than 4
YES, Triangle