Triangles
Angles
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100
None of my sides are the same length and one angle has measure of 90 degrees. What kind of triangle am I?
right scalene
100
I am any angle that is less than 90 degrees.
an acute angle
100
Two of my angles have measure of 50 and 80. What is the third angle measure?
50 degrees
100
I am a triangle with 2 sides that are the same length
isosceles triangle
100
How many degrees do the angles in a triangle add up to?
180 degrees
200
Can a triangle have angle measures of 87, 61, and 34?
Yes, they add up to 180 degrees.
200
Angles that share a side and vertex.
Adjacent angles.
200
An angle is 30 degrees, what is its complementary angle?
60 degrees. Complementary angles add up to 90 degrees!
200
All of my angles are less than 90 degrees
acute triangle
200
Find the supplementary angle to 100.
80 degrees
300
I am a triangle with 1 angle greater than 90 degrees and 2 angles less than 90 degrees
an obtuse triangle
300
Angles that add up to 180 degrees.
Supplementary angles
300
Two angles in triangle are 50 and 65. Find the third angle.
65 degrees
300
I am a triangle with 3 sides that are all different lengths
scalene triangle
300
Three angles in a triangle are the same measure. What will their measure be?
60 degrees each
400
Draw an isosceles triangle.
(two sides are congruent)
400
Angles that add up to 90 degrees.
Complementary angles.
400
A right triangle has one angle that is 30 degrees? Find the third angle.
60 degrees
400
Draw a right triangle
(See student work)
400
Two angles are complementary and are the same measure. What is their measure?
45 degrees
500
The angles in a triangle are 120, 50, and 10. Classify the triangle by its angle measure.
obtuse
500
Angles that are formed by intersecting lines. They are opposite and congruent.
Vertical angles.
500
My angles have measure of x - 40, 3x - 20 and 60. What is x?
x=45 degrees
500
Draw an isosceles triangle
(See student work)
500

Brandon draws a triangle that has one 160 angle. What is the measurement of each of the other two angles in the triangle?

180 - 160 = 20 20 / 2 = 10 Each angle is 10 degrees

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