Transcript triangle classification

Classifying Triangles
Reference pages p.484-488
E.Q How do you classify
triangles and find the interior
and exterior angle measures?
Angles
Sides
Acute
Equilateral
Right
Isosceles
Obtuse
Scalene
Page 486 Textbook
Angle Measures-No picture
1.
2.
3.
25º, 125º, 30º
30º, 60º, 90º
47º, 56º, 77º
Side Measures-No picture
1.
2.
3.
8m, 11m, 8m
5cm, 5cm, 5cm
7 in, 9 in, 13in
All triangles have an angle sum
of…….
60°
60°
60°
X°
50°
70°
120°
30°
T°
Mental Meltdown
Find the missing angle
1. 30, 60, ?
2. 60, 80, ?
3. 90, 19, ?
4. 47, 99, ?
5. 50.3, 60.9, ?
6. 62 1/3, 74 3/8, ?
7. Demonstrate an obtuse angle.
Supplementary Angles
Supplementary angles are adjacent angles that
=_______°.
If we know the measure of one angle in a
supplementary angle pair, then we can find the angle
of the other.
x°
75°
42°
55°
80° x°
y°
100°
45°
35°
42°
x°
48° y°
3-2-1
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3 ways to classify a triangle by angles,
2 ways to classify a triangle by sides,
and 1 way to determine a missing interior angle.