Transcript Triangles and Angles - Frederick Douglass Academy High
Geometry OTQ
Are you ready for this chapter?
pg. 235 1 – 3, 5, and 6 g 2
Homework Questions?
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What will I be able to do?
Identify and classify triangles by angles and sides
What standard will I learn?
12.0 Students find/use measures of sides/angles of triangles
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4.1 Triangles and Angles
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Classifying Δs (angles vs sides) Equiangular (all s) Equilateral (3 sides) Acute (3 acute s) 40 80 60 Isosceles (2 sides) Right (1 right ) Scalene (0 sides) Obtuse (1 obtuse ) 120 g 2
What kind of triangle does the cable suspension of this bridge have?
RIGHT TRIANGLE!!!!
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Example 1: Classify each triangle by its angles and sides.
1. MNQ acute; equilateral
2.
NQP
obtuse; scalene 3. MNP acute; scalene g 2
Example 2:
Classify the triangle by the description given:
A) Side lengths: 3 in, 5 in, 3 in
Isosceles
B) Side lengths: 3 ft, 5 ft, 4 ft
Scalene
C) Angle measures: 60 °, 90°, 30°
right
D) Angles measures: 10 °, 160°, 10°
obtuse g 2
Pencils Down!
Complete the sentence with always, sometimes, or never.
2) A right ________ has an angle of 90 °.
sometimes
3) An isosceles triangle is __________ an equilateral .
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SUMMARY
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CLASSWORK Pages 241 – 242 #’s 22 – 36 even, 40 – 46 even
Homework is on the next slide
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HOMEWORK Page 244 #’s 74 – 80 even
Do your homework….or Pyramid Head will be sent to your house!!!
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